2 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
3 * of PCI-SCSI IO processors.
5 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
6 * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx>
8 * This driver is derived from the Linux sym53c8xx driver.
9 * Copyright (C) 1998-2000 Gerard Roudier
11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
14 * The original ncr driver has been written for 386bsd and FreeBSD by
15 * Wolfgang Stanglmeier <wolf@cologne.de>
16 * Stefan Esser <se@mi.Uni-Koeln.de>
17 * Copyright (C) 1994 Wolfgang Stanglmeier
19 * Other major contributions:
21 * NVRAM detection and reading.
22 * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
24 *-----------------------------------------------------------------------------
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
36 * You should have received a copy of the GNU General Public License
37 * along with this program; if not, write to the Free Software
38 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
41 #include <linux/slab.h>
42 #include <asm/param.h> /* for timeouts in units of HZ */
45 #include "sym_nvram.h"
49 * Needed function prototypes.
51 static void sym_int_ma (struct sym_hcb
*np
);
52 static void sym_int_sir(struct sym_hcb
*);
53 static struct sym_ccb
*sym_alloc_ccb(struct sym_hcb
*np
);
54 static struct sym_ccb
*sym_ccb_from_dsa(struct sym_hcb
*np
, u32 dsa
);
55 static void sym_alloc_lcb_tags (struct sym_hcb
*np
, u_char tn
, u_char ln
);
56 static void sym_complete_error (struct sym_hcb
*np
, struct sym_ccb
*cp
);
57 static void sym_complete_ok (struct sym_hcb
*np
, struct sym_ccb
*cp
);
58 static int sym_compute_residual(struct sym_hcb
*np
, struct sym_ccb
*cp
);
61 * Print a buffer in hexadecimal format with a ".\n" at end.
63 static void sym_printl_hex(u_char
*p
, int n
)
70 static void sym_print_msg(struct sym_ccb
*cp
, char *label
, u_char
*msg
)
72 sym_print_addr(cp
->cmd
, "%s: ", label
);
78 static void sym_print_nego_msg(struct sym_hcb
*np
, int target
, char *label
, u_char
*msg
)
80 struct sym_tcb
*tp
= &np
->target
[target
];
81 dev_info(&tp
->starget
->dev
, "%s: ", label
);
88 * Print something that tells about extended errors.
90 void sym_print_xerr(struct scsi_cmnd
*cmd
, int x_status
)
92 if (x_status
& XE_PARITY_ERR
) {
93 sym_print_addr(cmd
, "unrecovered SCSI parity error.\n");
95 if (x_status
& XE_EXTRA_DATA
) {
96 sym_print_addr(cmd
, "extraneous data discarded.\n");
98 if (x_status
& XE_BAD_PHASE
) {
99 sym_print_addr(cmd
, "illegal scsi phase (4/5).\n");
101 if (x_status
& XE_SODL_UNRUN
) {
102 sym_print_addr(cmd
, "ODD transfer in DATA OUT phase.\n");
104 if (x_status
& XE_SWIDE_OVRUN
) {
105 sym_print_addr(cmd
, "ODD transfer in DATA IN phase.\n");
110 * Return a string for SCSI BUS mode.
112 static char *sym_scsi_bus_mode(int mode
)
115 case SMODE_HVD
: return "HVD";
116 case SMODE_SE
: return "SE";
117 case SMODE_LVD
: return "LVD";
123 * Soft reset the chip.
125 * Raising SRST when the chip is running may cause
126 * problems on dual function chips (see below).
127 * On the other hand, LVD devices need some delay
128 * to settle and report actual BUS mode in STEST4.
130 static void sym_chip_reset (struct sym_hcb
*np
)
132 OUTB(np
, nc_istat
, SRST
);
135 OUTB(np
, nc_istat
, 0);
137 udelay(2000); /* For BUS MODE to settle */
141 * Really soft reset the chip.:)
143 * Some 896 and 876 chip revisions may hang-up if we set
144 * the SRST (soft reset) bit at the wrong time when SCRIPTS
146 * So, we need to abort the current operation prior to
147 * soft resetting the chip.
149 static void sym_soft_reset (struct sym_hcb
*np
)
154 if (!(np
->features
& FE_ISTAT1
) || !(INB(np
, nc_istat1
) & SCRUN
))
157 OUTB(np
, nc_istat
, CABRT
);
158 for (i
= 100000 ; i
; --i
) {
159 istat
= INB(np
, nc_istat
);
163 else if (istat
& DIP
) {
164 if (INB(np
, nc_dstat
) & ABRT
)
169 OUTB(np
, nc_istat
, 0);
171 printf("%s: unable to abort current chip operation, "
172 "ISTAT=0x%02x.\n", sym_name(np
), istat
);
178 * Start reset process.
180 * The interrupt handler will reinitialize the chip.
182 static void sym_start_reset(struct sym_hcb
*np
)
184 sym_reset_scsi_bus(np
, 1);
187 int sym_reset_scsi_bus(struct sym_hcb
*np
, int enab_int
)
192 sym_soft_reset(np
); /* Soft reset the chip */
194 OUTW(np
, nc_sien
, RST
);
196 * Enable Tolerant, reset IRQD if present and
197 * properly set IRQ mode, prior to resetting the bus.
199 OUTB(np
, nc_stest3
, TE
);
200 OUTB(np
, nc_dcntl
, (np
->rv_dcntl
& IRQM
));
201 OUTB(np
, nc_scntl1
, CRST
);
205 if (!SYM_SETUP_SCSI_BUS_CHECK
)
208 * Check for no terminators or SCSI bus shorts to ground.
209 * Read SCSI data bus, data parity bits and control signals.
210 * We are expecting RESET to be TRUE and other signals to be
213 term
= INB(np
, nc_sstat0
);
214 term
= ((term
& 2) << 7) + ((term
& 1) << 17); /* rst sdp0 */
215 term
|= ((INB(np
, nc_sstat2
) & 0x01) << 26) | /* sdp1 */
216 ((INW(np
, nc_sbdl
) & 0xff) << 9) | /* d7-0 */
217 ((INW(np
, nc_sbdl
) & 0xff00) << 10) | /* d15-8 */
218 INB(np
, nc_sbcl
); /* req ack bsy sel atn msg cd io */
223 if (term
!= (2<<7)) {
224 printf("%s: suspicious SCSI data while resetting the BUS.\n",
226 printf("%s: %sdp0,d7-0,rst,req,ack,bsy,sel,atn,msg,c/d,i/o = "
227 "0x%lx, expecting 0x%lx\n",
229 (np
->features
& FE_WIDE
) ? "dp1,d15-8," : "",
230 (u_long
)term
, (u_long
)(2<<7));
231 if (SYM_SETUP_SCSI_BUS_CHECK
== 1)
235 OUTB(np
, nc_scntl1
, 0);
240 * Select SCSI clock frequency
242 static void sym_selectclock(struct sym_hcb
*np
, u_char scntl3
)
245 * If multiplier not present or not selected, leave here.
247 if (np
->multiplier
<= 1) {
248 OUTB(np
, nc_scntl3
, scntl3
);
252 if (sym_verbose
>= 2)
253 printf ("%s: enabling clock multiplier\n", sym_name(np
));
255 OUTB(np
, nc_stest1
, DBLEN
); /* Enable clock multiplier */
257 * Wait for the LCKFRQ bit to be set if supported by the chip.
258 * Otherwise wait 50 micro-seconds (at least).
260 if (np
->features
& FE_LCKFRQ
) {
262 while (!(INB(np
, nc_stest4
) & LCKFRQ
) && --i
> 0)
265 printf("%s: the chip cannot lock the frequency\n",
271 OUTB(np
, nc_stest3
, HSC
); /* Halt the scsi clock */
272 OUTB(np
, nc_scntl3
, scntl3
);
273 OUTB(np
, nc_stest1
, (DBLEN
|DBLSEL
));/* Select clock multiplier */
274 OUTB(np
, nc_stest3
, 0x00); /* Restart scsi clock */
279 * Determine the chip's clock frequency.
281 * This is essential for the negotiation of the synchronous
284 * Note: we have to return the correct value.
285 * THERE IS NO SAFE DEFAULT VALUE.
287 * Most NCR/SYMBIOS boards are delivered with a 40 Mhz clock.
288 * 53C860 and 53C875 rev. 1 support fast20 transfers but
289 * do not have a clock doubler and so are provided with a
290 * 80 MHz clock. All other fast20 boards incorporate a doubler
291 * and so should be delivered with a 40 MHz clock.
292 * The recent fast40 chips (895/896/895A/1010) use a 40 Mhz base
293 * clock and provide a clock quadrupler (160 Mhz).
297 * calculate SCSI clock frequency (in KHz)
299 static unsigned getfreq (struct sym_hcb
*np
, int gen
)
305 * Measure GEN timer delay in order
306 * to calculate SCSI clock frequency
308 * This code will never execute too
309 * many loop iterations (if DELAY is
310 * reasonably correct). It could get
311 * too low a delay (too high a freq.)
312 * if the CPU is slow executing the
313 * loop for some reason (an NMI, for
314 * example). For this reason we will
315 * if multiple measurements are to be
316 * performed trust the higher delay
317 * (lower frequency returned).
319 OUTW(np
, nc_sien
, 0); /* mask all scsi interrupts */
320 INW(np
, nc_sist
); /* clear pending scsi interrupt */
321 OUTB(np
, nc_dien
, 0); /* mask all dma interrupts */
322 INW(np
, nc_sist
); /* another one, just to be sure :) */
324 * The C1010-33 core does not report GEN in SIST,
325 * if this interrupt is masked in SIEN.
326 * I don't know yet if the C1010-66 behaves the same way.
328 if (np
->features
& FE_C10
) {
329 OUTW(np
, nc_sien
, GEN
);
330 OUTB(np
, nc_istat1
, SIRQD
);
332 OUTB(np
, nc_scntl3
, 4); /* set pre-scaler to divide by 3 */
333 OUTB(np
, nc_stime1
, 0); /* disable general purpose timer */
334 OUTB(np
, nc_stime1
, gen
); /* set to nominal delay of 1<<gen * 125us */
335 while (!(INW(np
, nc_sist
) & GEN
) && ms
++ < 100000)
336 udelay(1000/4); /* count in 1/4 of ms */
337 OUTB(np
, nc_stime1
, 0); /* disable general purpose timer */
339 * Undo C1010-33 specific settings.
341 if (np
->features
& FE_C10
) {
342 OUTW(np
, nc_sien
, 0);
343 OUTB(np
, nc_istat1
, 0);
346 * set prescaler to divide by whatever 0 means
347 * 0 ought to choose divide by 2, but appears
348 * to set divide by 3.5 mode in my 53c810 ...
350 OUTB(np
, nc_scntl3
, 0);
353 * adjust for prescaler, and convert into KHz
355 f
= ms
? ((1 << gen
) * (4340*4)) / ms
: 0;
358 * The C1010-33 result is biased by a factor
359 * of 2/3 compared to earlier chips.
361 if (np
->features
& FE_C10
)
364 if (sym_verbose
>= 2)
365 printf ("%s: Delay (GEN=%d): %u msec, %u KHz\n",
366 sym_name(np
), gen
, ms
/4, f
);
371 static unsigned sym_getfreq (struct sym_hcb
*np
)
376 getfreq (np
, gen
); /* throw away first result */
377 f1
= getfreq (np
, gen
);
378 f2
= getfreq (np
, gen
);
379 if (f1
> f2
) f1
= f2
; /* trust lower result */
384 * Get/probe chip SCSI clock frequency
386 static void sym_getclock (struct sym_hcb
*np
, int mult
)
388 unsigned char scntl3
= np
->sv_scntl3
;
389 unsigned char stest1
= np
->sv_stest1
;
395 * True with 875/895/896/895A with clock multiplier selected
397 if (mult
> 1 && (stest1
& (DBLEN
+DBLSEL
)) == DBLEN
+DBLSEL
) {
398 if (sym_verbose
>= 2)
399 printf ("%s: clock multiplier found\n", sym_name(np
));
400 np
->multiplier
= mult
;
404 * If multiplier not found or scntl3 not 7,5,3,
405 * reset chip and get frequency from general purpose timer.
406 * Otherwise trust scntl3 BIOS setting.
408 if (np
->multiplier
!= mult
|| (scntl3
& 7) < 3 || !(scntl3
& 1)) {
409 OUTB(np
, nc_stest1
, 0); /* make sure doubler is OFF */
410 f1
= sym_getfreq (np
);
413 printf ("%s: chip clock is %uKHz\n", sym_name(np
), f1
);
415 if (f1
< 45000) f1
= 40000;
416 else if (f1
< 55000) f1
= 50000;
419 if (f1
< 80000 && mult
> 1) {
420 if (sym_verbose
>= 2)
421 printf ("%s: clock multiplier assumed\n",
423 np
->multiplier
= mult
;
426 if ((scntl3
& 7) == 3) f1
= 40000;
427 else if ((scntl3
& 7) == 5) f1
= 80000;
430 f1
/= np
->multiplier
;
434 * Compute controller synchronous parameters.
436 f1
*= np
->multiplier
;
441 * Get/probe PCI clock frequency
443 static int sym_getpciclock (struct sym_hcb
*np
)
448 * For now, we only need to know about the actual
449 * PCI BUS clock frequency for C1010-66 chips.
451 if (np
->features
& FE_66MHZ
) {
452 OUTB(np
, nc_stest1
, SCLK
); /* Use the PCI clock as SCSI clock */
454 OUTB(np
, nc_stest1
, 0);
462 * SYMBIOS chip clock divisor table.
464 * Divisors are multiplied by 10,000,000 in order to make
465 * calculations more simple.
468 static const u32 div_10M
[] = {2*_5M
, 3*_5M
, 4*_5M
, 6*_5M
, 8*_5M
, 12*_5M
, 16*_5M
};
471 * Get clock factor and sync divisor for a given
472 * synchronous factor period.
475 sym_getsync(struct sym_hcb
*np
, u_char dt
, u_char sfac
, u_char
*divp
, u_char
*fakp
)
477 u32 clk
= np
->clock_khz
; /* SCSI clock frequency in kHz */
478 int div
= np
->clock_divn
; /* Number of divisors supported */
479 u32 fak
; /* Sync factor in sxfer */
480 u32 per
; /* Period in tenths of ns */
481 u32 kpc
; /* (per * clk) */
485 * Compute the synchronous period in tenths of nano-seconds
487 if (dt
&& sfac
<= 9) per
= 125;
488 else if (sfac
<= 10) per
= 250;
489 else if (sfac
== 11) per
= 303;
490 else if (sfac
== 12) per
= 500;
491 else per
= 40 * sfac
;
499 * For earliest C10 revision 0, we cannot use extra
500 * clocks for the setting of the SCSI clocking.
501 * Note that this limits the lowest sync data transfer
502 * to 5 Mega-transfers per second and may result in
503 * using higher clock divisors.
505 if ((np
->features
& (FE_C10
|FE_U3EN
)) == FE_C10
) {
507 * Look for the lowest clock divisor that allows an
508 * output speed not faster than the period.
512 if (kpc
> (div_10M
[div
] << 2)) {
517 fak
= 0; /* No extra clocks */
518 if (div
== np
->clock_divn
) { /* Are we too fast ? */
527 * Look for the greatest clock divisor that allows an
528 * input speed faster than the period.
531 if (kpc
>= (div_10M
[div
] << 2)) break;
534 * Calculate the lowest clock factor that allows an output
535 * speed not faster than the period, and the max output speed.
536 * If fak >= 1 we will set both XCLKH_ST and XCLKH_DT.
537 * If fak >= 2 we will also set XCLKS_ST and XCLKS_DT.
540 fak
= (kpc
- 1) / (div_10M
[div
] << 1) + 1 - 2;
541 /* ret = ((2+fak)*div_10M[div])/np->clock_khz; */
543 fak
= (kpc
- 1) / div_10M
[div
] + 1 - 4;
544 /* ret = ((4+fak)*div_10M[div])/np->clock_khz; */
548 * Check against our hardware limits, or bugs :).
556 * Compute and return sync parameters.
565 * SYMBIOS chips allow burst lengths of 2, 4, 8, 16, 32, 64,
566 * 128 transfers. All chips support at least 16 transfers
567 * bursts. The 825A, 875 and 895 chips support bursts of up
568 * to 128 transfers and the 895A and 896 support bursts of up
569 * to 64 transfers. All other chips support up to 16
572 * For PCI 32 bit data transfers each transfer is a DWORD.
573 * It is a QUADWORD (8 bytes) for PCI 64 bit data transfers.
575 * We use log base 2 (burst length) as internal code, with
576 * value 0 meaning "burst disabled".
580 * Burst length from burst code.
582 #define burst_length(bc) (!(bc))? 0 : 1 << (bc)
585 * Burst code from io register bits.
587 #define burst_code(dmode, ctest4, ctest5) \
588 (ctest4) & 0x80? 0 : (((dmode) & 0xc0) >> 6) + ((ctest5) & 0x04) + 1
591 * Set initial io register bits from burst code.
593 static inline void sym_init_burst(struct sym_hcb
*np
, u_char bc
)
595 np
->rv_ctest4
&= ~0x80;
596 np
->rv_dmode
&= ~(0x3 << 6);
597 np
->rv_ctest5
&= ~0x4;
600 np
->rv_ctest4
|= 0x80;
604 np
->rv_dmode
|= ((bc
& 0x3) << 6);
605 np
->rv_ctest5
|= (bc
& 0x4);
610 * Save initial settings of some IO registers.
611 * Assumed to have been set by BIOS.
612 * We cannot reset the chip prior to reading the
613 * IO registers, since informations will be lost.
614 * Since the SCRIPTS processor may be running, this
615 * is not safe on paper, but it seems to work quite
618 static void sym_save_initial_setting (struct sym_hcb
*np
)
620 np
->sv_scntl0
= INB(np
, nc_scntl0
) & 0x0a;
621 np
->sv_scntl3
= INB(np
, nc_scntl3
) & 0x07;
622 np
->sv_dmode
= INB(np
, nc_dmode
) & 0xce;
623 np
->sv_dcntl
= INB(np
, nc_dcntl
) & 0xa8;
624 np
->sv_ctest3
= INB(np
, nc_ctest3
) & 0x01;
625 np
->sv_ctest4
= INB(np
, nc_ctest4
) & 0x80;
626 np
->sv_gpcntl
= INB(np
, nc_gpcntl
);
627 np
->sv_stest1
= INB(np
, nc_stest1
);
628 np
->sv_stest2
= INB(np
, nc_stest2
) & 0x20;
629 np
->sv_stest4
= INB(np
, nc_stest4
);
630 if (np
->features
& FE_C10
) { /* Always large DMA fifo + ultra3 */
631 np
->sv_scntl4
= INB(np
, nc_scntl4
);
632 np
->sv_ctest5
= INB(np
, nc_ctest5
) & 0x04;
635 np
->sv_ctest5
= INB(np
, nc_ctest5
) & 0x24;
640 * - LVD capable chips (895/895A/896/1010) report the current BUS mode
641 * through the STEST4 IO register.
642 * - For previous generation chips (825/825A/875), the user has to tell us
643 * how to check against HVD, since a 100% safe algorithm is not possible.
645 static void sym_set_bus_mode(struct sym_hcb
*np
, struct sym_nvram
*nvram
)
650 np
->scsi_mode
= SMODE_SE
;
651 if (np
->features
& (FE_ULTRA2
|FE_ULTRA3
))
652 np
->scsi_mode
= (np
->sv_stest4
& SMODE
);
653 else if (np
->features
& FE_DIFF
) {
654 if (SYM_SETUP_SCSI_DIFF
== 1) {
656 if (np
->sv_stest2
& 0x20)
657 np
->scsi_mode
= SMODE_HVD
;
658 } else if (nvram
->type
== SYM_SYMBIOS_NVRAM
) {
659 if (!(INB(np
, nc_gpreg
) & 0x08))
660 np
->scsi_mode
= SMODE_HVD
;
662 } else if (SYM_SETUP_SCSI_DIFF
== 2)
663 np
->scsi_mode
= SMODE_HVD
;
665 if (np
->scsi_mode
== SMODE_HVD
)
666 np
->rv_stest2
|= 0x20;
670 * Prepare io register values used by sym_start_up()
671 * according to selected and supported features.
673 static int sym_prepare_setting(struct Scsi_Host
*shost
, struct sym_hcb
*np
, struct sym_nvram
*nvram
)
675 struct sym_data
*sym_data
= shost_priv(shost
);
676 struct pci_dev
*pdev
= sym_data
->pdev
;
681 np
->maxwide
= (np
->features
& FE_WIDE
) ? 1 : 0;
684 * Guess the frequency of the chip's clock.
686 if (np
->features
& (FE_ULTRA3
| FE_ULTRA2
))
687 np
->clock_khz
= 160000;
688 else if (np
->features
& FE_ULTRA
)
689 np
->clock_khz
= 80000;
691 np
->clock_khz
= 40000;
694 * Get the clock multiplier factor.
696 if (np
->features
& FE_QUAD
)
698 else if (np
->features
& FE_DBLR
)
704 * Measure SCSI clock frequency for chips
705 * it may vary from assumed one.
707 if (np
->features
& FE_VARCLK
)
708 sym_getclock(np
, np
->multiplier
);
711 * Divisor to be used for async (timer pre-scaler).
713 i
= np
->clock_divn
- 1;
715 if (10ul * SYM_CONF_MIN_ASYNC
* np
->clock_khz
> div_10M
[i
]) {
723 * The C1010 uses hardwired divisors for async.
724 * So, we just throw away, the async. divisor.:-)
726 if (np
->features
& FE_C10
)
730 * Minimum synchronous period factor supported by the chip.
731 * Btw, 'period' is in tenths of nanoseconds.
733 period
= (4 * div_10M
[0] + np
->clock_khz
- 1) / np
->clock_khz
;
735 if (period
<= 250) np
->minsync
= 10;
736 else if (period
<= 303) np
->minsync
= 11;
737 else if (period
<= 500) np
->minsync
= 12;
738 else np
->minsync
= (period
+ 40 - 1) / 40;
741 * Check against chip SCSI standard support (SCSI-2,ULTRA,ULTRA2).
743 if (np
->minsync
< 25 &&
744 !(np
->features
& (FE_ULTRA
|FE_ULTRA2
|FE_ULTRA3
)))
746 else if (np
->minsync
< 12 &&
747 !(np
->features
& (FE_ULTRA2
|FE_ULTRA3
)))
751 * Maximum synchronous period factor supported by the chip.
753 period
= (11 * div_10M
[np
->clock_divn
- 1]) / (4 * np
->clock_khz
);
754 np
->maxsync
= period
> 2540 ? 254 : period
/ 10;
757 * If chip is a C1010, guess the sync limits in DT mode.
759 if ((np
->features
& (FE_C10
|FE_ULTRA3
)) == (FE_C10
|FE_ULTRA3
)) {
760 if (np
->clock_khz
== 160000) {
763 np
->maxoffs_dt
= nvram
->type
? 62 : 31;
768 * 64 bit addressing (895A/896/1010) ?
770 if (np
->features
& FE_DAC
) {
772 np
->rv_ccntl1
|= (DDAC
);
773 else if (SYM_CONF_DMA_ADDRESSING_MODE
== 1)
774 np
->rv_ccntl1
|= (XTIMOD
| EXTIBMV
);
775 else if (SYM_CONF_DMA_ADDRESSING_MODE
== 2)
776 np
->rv_ccntl1
|= (0 | EXTIBMV
);
780 * Phase mismatch handled by SCRIPTS (895A/896/1010) ?
782 if (np
->features
& FE_NOPM
)
783 np
->rv_ccntl0
|= (ENPMJ
);
786 * C1010-33 Errata: Part Number:609-039638 (rev. 1) is fixed.
787 * In dual channel mode, contention occurs if internal cycles
788 * are used. Disable internal cycles.
790 if (pdev
->device
== PCI_DEVICE_ID_LSI_53C1010_33
&&
791 pdev
->revision
< 0x1)
792 np
->rv_ccntl0
|= DILS
;
795 * Select burst length (dwords)
797 burst_max
= SYM_SETUP_BURST_ORDER
;
798 if (burst_max
== 255)
799 burst_max
= burst_code(np
->sv_dmode
, np
->sv_ctest4
,
803 if (burst_max
> np
->maxburst
)
804 burst_max
= np
->maxburst
;
806 if ((pdev
->device
== PCI_DEVICE_ID_NCR_53C810
&&
807 pdev
->revision
>= 0x10 && pdev
->revision
<= 0x11) ||
808 (pdev
->device
== PCI_DEVICE_ID_NCR_53C860
&&
809 pdev
->revision
<= 0x1))
810 np
->features
&= ~(FE_WRIE
|FE_ERL
|FE_ERMP
);
813 * Select all supported special features.
814 * If we are using on-board RAM for scripts, prefetch (PFEN)
815 * does not help, but burst op fetch (BOF) does.
816 * Disabling PFEN makes sure BOF will be used.
818 if (np
->features
& FE_ERL
)
819 np
->rv_dmode
|= ERL
; /* Enable Read Line */
820 if (np
->features
& FE_BOF
)
821 np
->rv_dmode
|= BOF
; /* Burst Opcode Fetch */
822 if (np
->features
& FE_ERMP
)
823 np
->rv_dmode
|= ERMP
; /* Enable Read Multiple */
824 if ((np
->features
& FE_PFEN
) && !np
->ram_ba
)
825 np
->rv_dcntl
|= PFEN
; /* Prefetch Enable */
826 if (np
->features
& FE_CLSE
)
827 np
->rv_dcntl
|= CLSE
; /* Cache Line Size Enable */
828 if (np
->features
& FE_WRIE
)
829 np
->rv_ctest3
|= WRIE
; /* Write and Invalidate */
830 if (np
->features
& FE_DFS
)
831 np
->rv_ctest5
|= DFS
; /* Dma Fifo Size */
836 np
->rv_ctest4
|= MPEE
; /* Master parity checking */
837 np
->rv_scntl0
|= 0x0a; /* full arb., ena parity, par->ATN */
840 * Get parity checking, host ID and verbose mode from NVRAM
844 sym_nvram_setup_host(shost
, np
, nvram
);
847 * Get SCSI addr of host adapter (set by bios?).
849 if (np
->myaddr
== 255) {
850 np
->myaddr
= INB(np
, nc_scid
) & 0x07;
852 np
->myaddr
= SYM_SETUP_HOST_ID
;
856 * Prepare initial io register bits for burst length
858 sym_init_burst(np
, burst_max
);
860 sym_set_bus_mode(np
, nvram
);
863 * Set LED support from SCRIPTS.
864 * Ignore this feature for boards known to use a
865 * specific GPIO wiring and for the 895A, 896
866 * and 1010 that drive the LED directly.
868 if ((SYM_SETUP_SCSI_LED
||
869 (nvram
->type
== SYM_SYMBIOS_NVRAM
||
870 (nvram
->type
== SYM_TEKRAM_NVRAM
&&
871 pdev
->device
== PCI_DEVICE_ID_NCR_53C895
))) &&
872 !(np
->features
& FE_LEDC
) && !(np
->sv_gpcntl
& 0x01))
873 np
->features
|= FE_LED0
;
878 switch(SYM_SETUP_IRQ_MODE
& 3) {
880 np
->rv_dcntl
|= IRQM
;
883 np
->rv_dcntl
|= (np
->sv_dcntl
& IRQM
);
890 * Configure targets according to driver setup.
891 * If NVRAM present get targets setup from NVRAM.
893 for (i
= 0 ; i
< SYM_CONF_MAX_TARGET
; i
++) {
894 struct sym_tcb
*tp
= &np
->target
[i
];
896 tp
->usrflags
|= (SYM_DISC_ENABLED
| SYM_TAGS_ENABLED
);
897 tp
->usrtags
= SYM_SETUP_MAX_TAG
;
898 tp
->usr_width
= np
->maxwide
;
901 sym_nvram_setup_target(tp
, i
, nvram
);
904 tp
->usrflags
&= ~SYM_TAGS_ENABLED
;
908 * Let user know about the settings.
910 printf("%s: %s, ID %d, Fast-%d, %s, %s\n", sym_name(np
),
911 sym_nvram_type(nvram
), np
->myaddr
,
912 (np
->features
& FE_ULTRA3
) ? 80 :
913 (np
->features
& FE_ULTRA2
) ? 40 :
914 (np
->features
& FE_ULTRA
) ? 20 : 10,
915 sym_scsi_bus_mode(np
->scsi_mode
),
916 (np
->rv_scntl0
& 0xa) ? "parity checking" : "NO parity");
918 * Tell him more on demand.
921 printf("%s: %s IRQ line driver%s\n",
923 np
->rv_dcntl
& IRQM
? "totem pole" : "open drain",
924 np
->ram_ba
? ", using on-chip SRAM" : "");
925 printf("%s: using %s firmware.\n", sym_name(np
), np
->fw_name
);
926 if (np
->features
& FE_NOPM
)
927 printf("%s: handling phase mismatch from SCRIPTS.\n",
933 if (sym_verbose
>= 2) {
934 printf ("%s: initial SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
935 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
936 sym_name(np
), np
->sv_scntl3
, np
->sv_dmode
, np
->sv_dcntl
,
937 np
->sv_ctest3
, np
->sv_ctest4
, np
->sv_ctest5
);
939 printf ("%s: final SCNTL3/DMODE/DCNTL/CTEST3/4/5 = "
940 "(hex) %02x/%02x/%02x/%02x/%02x/%02x\n",
941 sym_name(np
), np
->rv_scntl3
, np
->rv_dmode
, np
->rv_dcntl
,
942 np
->rv_ctest3
, np
->rv_ctest4
, np
->rv_ctest5
);
949 * Test the pci bus snoop logic :-(
951 * Has to be called with interrupts disabled.
953 #ifdef CONFIG_SCSI_SYM53C8XX_MMIO
954 static int sym_regtest(struct sym_hcb
*np
)
956 register volatile u32 data
;
958 * chip registers may NOT be cached.
959 * write 0xffffffff to a read only register area,
960 * and try to read it back.
963 OUTL(np
, nc_dstat
, data
);
964 data
= INL(np
, nc_dstat
);
965 if (data
== 0xffffffff) {
966 printf ("CACHE TEST FAILED: reg dstat-sstat2 readback %x.\n",
973 static inline int sym_regtest(struct sym_hcb
*np
)
979 static int sym_snooptest(struct sym_hcb
*np
)
981 u32 sym_rd
, sym_wr
, sym_bk
, host_rd
, host_wr
, pc
, dstat
;
984 err
= sym_regtest(np
);
989 * Enable Master Parity Checking as we intend
990 * to enable it for normal operations.
992 OUTB(np
, nc_ctest4
, (np
->rv_ctest4
& MPEE
));
996 pc
= SCRIPTZ_BA(np
, snooptest
);
1000 * Set memory and register.
1002 np
->scratch
= cpu_to_scr(host_wr
);
1003 OUTL(np
, nc_temp
, sym_wr
);
1005 * Start script (exchange values)
1007 OUTL(np
, nc_dsa
, np
->hcb_ba
);
1010 * Wait 'til done (with timeout)
1012 for (i
=0; i
<SYM_SNOOP_TIMEOUT
; i
++)
1013 if (INB(np
, nc_istat
) & (INTF
|SIP
|DIP
))
1015 if (i
>=SYM_SNOOP_TIMEOUT
) {
1016 printf ("CACHE TEST FAILED: timeout.\n");
1020 * Check for fatal DMA errors.
1022 dstat
= INB(np
, nc_dstat
);
1023 if ((dstat
& MDPE
) && (np
->rv_ctest4
& MPEE
)) {
1024 printf ("%s: PCI DATA PARITY ERROR DETECTED - "
1025 "DISABLING MASTER DATA PARITY CHECKING.\n",
1027 np
->rv_ctest4
&= ~MPEE
;
1030 if (dstat
& (MDPE
|BF
|IID
)) {
1031 printf ("CACHE TEST FAILED: DMA error (dstat=0x%02x).", dstat
);
1035 * Save termination position.
1037 pc
= INL(np
, nc_dsp
);
1039 * Read memory and register.
1041 host_rd
= scr_to_cpu(np
->scratch
);
1042 sym_rd
= INL(np
, nc_scratcha
);
1043 sym_bk
= INL(np
, nc_temp
);
1045 * Check termination position.
1047 if (pc
!= SCRIPTZ_BA(np
, snoopend
)+8) {
1048 printf ("CACHE TEST FAILED: script execution failed.\n");
1049 printf ("start=%08lx, pc=%08lx, end=%08lx\n",
1050 (u_long
) SCRIPTZ_BA(np
, snooptest
), (u_long
) pc
,
1051 (u_long
) SCRIPTZ_BA(np
, snoopend
) +8);
1057 if (host_wr
!= sym_rd
) {
1058 printf ("CACHE TEST FAILED: host wrote %d, chip read %d.\n",
1059 (int) host_wr
, (int) sym_rd
);
1062 if (host_rd
!= sym_wr
) {
1063 printf ("CACHE TEST FAILED: chip wrote %d, host read %d.\n",
1064 (int) sym_wr
, (int) host_rd
);
1067 if (sym_bk
!= sym_wr
) {
1068 printf ("CACHE TEST FAILED: chip wrote %d, read back %d.\n",
1069 (int) sym_wr
, (int) sym_bk
);
1077 * log message for real hard errors
1079 * sym0 targ 0?: ERROR (ds:si) (so-si-sd) (sx/s3/s4) @ name (dsp:dbc).
1080 * reg: r0 r1 r2 r3 r4 r5 r6 ..... rf.
1082 * exception register:
1087 * so: control lines as driven by chip.
1088 * si: control lines as seen by chip.
1089 * sd: scsi data lines as seen by chip.
1092 * sx: sxfer (see the manual)
1093 * s3: scntl3 (see the manual)
1094 * s4: scntl4 (see the manual)
1096 * current script command:
1097 * dsp: script address (relative to start of script).
1098 * dbc: first word of script command.
1100 * First 24 register of the chip:
1103 static void sym_log_hard_error(struct Scsi_Host
*shost
, u_short sist
, u_char dstat
)
1105 struct sym_hcb
*np
= sym_get_hcb(shost
);
1110 u_char
*script_base
;
1113 dsp
= INL(np
, nc_dsp
);
1115 if (dsp
> np
->scripta_ba
&&
1116 dsp
<= np
->scripta_ba
+ np
->scripta_sz
) {
1117 script_ofs
= dsp
- np
->scripta_ba
;
1118 script_size
= np
->scripta_sz
;
1119 script_base
= (u_char
*) np
->scripta0
;
1120 script_name
= "scripta";
1122 else if (np
->scriptb_ba
< dsp
&&
1123 dsp
<= np
->scriptb_ba
+ np
->scriptb_sz
) {
1124 script_ofs
= dsp
- np
->scriptb_ba
;
1125 script_size
= np
->scriptb_sz
;
1126 script_base
= (u_char
*) np
->scriptb0
;
1127 script_name
= "scriptb";
1132 script_name
= "mem";
1135 printf ("%s:%d: ERROR (%x:%x) (%x-%x-%x) (%x/%x/%x) @ (%s %x:%08x).\n",
1136 sym_name(np
), (unsigned)INB(np
, nc_sdid
)&0x0f, dstat
, sist
,
1137 (unsigned)INB(np
, nc_socl
), (unsigned)INB(np
, nc_sbcl
),
1138 (unsigned)INB(np
, nc_sbdl
), (unsigned)INB(np
, nc_sxfer
),
1139 (unsigned)INB(np
, nc_scntl3
),
1140 (np
->features
& FE_C10
) ? (unsigned)INB(np
, nc_scntl4
) : 0,
1141 script_name
, script_ofs
, (unsigned)INL(np
, nc_dbc
));
1143 if (((script_ofs
& 3) == 0) &&
1144 (unsigned)script_ofs
< script_size
) {
1145 printf ("%s: script cmd = %08x\n", sym_name(np
),
1146 scr_to_cpu((int) *(u32
*)(script_base
+ script_ofs
)));
1149 printf("%s: regdump:", sym_name(np
));
1150 for (i
= 0; i
< 24; i
++)
1151 printf(" %02x", (unsigned)INB_OFF(np
, i
));
1157 if (dstat
& (MDPE
|BF
))
1158 sym_log_bus_error(shost
);
1161 void sym_dump_registers(struct Scsi_Host
*shost
)
1163 struct sym_hcb
*np
= sym_get_hcb(shost
);
1167 sist
= INW(np
, nc_sist
);
1168 dstat
= INB(np
, nc_dstat
);
1169 sym_log_hard_error(shost
, sist
, dstat
);
1172 static struct sym_chip sym_dev_table
[] = {
1173 {PCI_DEVICE_ID_NCR_53C810
, 0x0f, "810", 4, 8, 4, 64,
1176 #ifdef SYM_DEBUG_GENERIC_SUPPORT
1177 {PCI_DEVICE_ID_NCR_53C810
, 0xff, "810a", 4, 8, 4, 1,
1181 {PCI_DEVICE_ID_NCR_53C810
, 0xff, "810a", 4, 8, 4, 1,
1182 FE_CACHE_SET
|FE_LDSTR
|FE_PFEN
|FE_BOF
}
1185 {PCI_DEVICE_ID_NCR_53C815
, 0xff, "815", 4, 8, 4, 64,
1188 {PCI_DEVICE_ID_NCR_53C825
, 0x0f, "825", 6, 8, 4, 64,
1189 FE_WIDE
|FE_BOF
|FE_ERL
|FE_DIFF
}
1191 {PCI_DEVICE_ID_NCR_53C825
, 0xff, "825a", 6, 8, 4, 2,
1192 FE_WIDE
|FE_CACHE0_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|FE_RAM
|FE_DIFF
}
1194 {PCI_DEVICE_ID_NCR_53C860
, 0xff, "860", 4, 8, 5, 1,
1195 FE_ULTRA
|FE_CACHE_SET
|FE_BOF
|FE_LDSTR
|FE_PFEN
}
1197 {PCI_DEVICE_ID_NCR_53C875
, 0x01, "875", 6, 16, 5, 2,
1198 FE_WIDE
|FE_ULTRA
|FE_CACHE0_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1199 FE_RAM
|FE_DIFF
|FE_VARCLK
}
1201 {PCI_DEVICE_ID_NCR_53C875
, 0xff, "875", 6, 16, 5, 2,
1202 FE_WIDE
|FE_ULTRA
|FE_DBLR
|FE_CACHE0_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1203 FE_RAM
|FE_DIFF
|FE_VARCLK
}
1205 {PCI_DEVICE_ID_NCR_53C875J
, 0xff, "875J", 6, 16, 5, 2,
1206 FE_WIDE
|FE_ULTRA
|FE_DBLR
|FE_CACHE0_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1207 FE_RAM
|FE_DIFF
|FE_VARCLK
}
1209 {PCI_DEVICE_ID_NCR_53C885
, 0xff, "885", 6, 16, 5, 2,
1210 FE_WIDE
|FE_ULTRA
|FE_DBLR
|FE_CACHE0_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1211 FE_RAM
|FE_DIFF
|FE_VARCLK
}
1213 #ifdef SYM_DEBUG_GENERIC_SUPPORT
1214 {PCI_DEVICE_ID_NCR_53C895
, 0xff, "895", 6, 31, 7, 2,
1215 FE_WIDE
|FE_ULTRA2
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFS
|
1219 {PCI_DEVICE_ID_NCR_53C895
, 0xff, "895", 6, 31, 7, 2,
1220 FE_WIDE
|FE_ULTRA2
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1224 {PCI_DEVICE_ID_NCR_53C896
, 0xff, "896", 6, 31, 7, 4,
1225 FE_WIDE
|FE_ULTRA2
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1226 FE_RAM
|FE_RAM8K
|FE_64BIT
|FE_DAC
|FE_IO256
|FE_NOPM
|FE_LEDC
|FE_LCKFRQ
}
1228 {PCI_DEVICE_ID_LSI_53C895A
, 0xff, "895a", 6, 31, 7, 4,
1229 FE_WIDE
|FE_ULTRA2
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1230 FE_RAM
|FE_RAM8K
|FE_DAC
|FE_IO256
|FE_NOPM
|FE_LEDC
|FE_LCKFRQ
}
1232 {PCI_DEVICE_ID_LSI_53C875A
, 0xff, "875a", 6, 31, 7, 4,
1233 FE_WIDE
|FE_ULTRA
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1234 FE_RAM
|FE_DAC
|FE_IO256
|FE_NOPM
|FE_LEDC
|FE_LCKFRQ
}
1236 {PCI_DEVICE_ID_LSI_53C1010_33
, 0x00, "1010-33", 6, 31, 7, 8,
1237 FE_WIDE
|FE_ULTRA3
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFBC
|FE_LDSTR
|FE_PFEN
|
1238 FE_RAM
|FE_RAM8K
|FE_64BIT
|FE_DAC
|FE_IO256
|FE_NOPM
|FE_LEDC
|FE_CRC
|
1241 {PCI_DEVICE_ID_LSI_53C1010_33
, 0xff, "1010-33", 6, 31, 7, 8,
1242 FE_WIDE
|FE_ULTRA3
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFBC
|FE_LDSTR
|FE_PFEN
|
1243 FE_RAM
|FE_RAM8K
|FE_64BIT
|FE_DAC
|FE_IO256
|FE_NOPM
|FE_LEDC
|FE_CRC
|
1246 {PCI_DEVICE_ID_LSI_53C1010_66
, 0xff, "1010-66", 6, 31, 7, 8,
1247 FE_WIDE
|FE_ULTRA3
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFBC
|FE_LDSTR
|FE_PFEN
|
1248 FE_RAM
|FE_RAM8K
|FE_64BIT
|FE_DAC
|FE_IO256
|FE_NOPM
|FE_LEDC
|FE_66MHZ
|FE_CRC
|
1251 {PCI_DEVICE_ID_LSI_53C1510
, 0xff, "1510d", 6, 31, 7, 4,
1252 FE_WIDE
|FE_ULTRA2
|FE_QUAD
|FE_CACHE_SET
|FE_BOF
|FE_DFS
|FE_LDSTR
|FE_PFEN
|
1253 FE_RAM
|FE_IO256
|FE_LEDC
}
1256 #define sym_num_devs (ARRAY_SIZE(sym_dev_table))
1259 * Look up the chip table.
1261 * Return a pointer to the chip entry if found,
1265 sym_lookup_chip_table (u_short device_id
, u_char revision
)
1267 struct sym_chip
*chip
;
1270 for (i
= 0; i
< sym_num_devs
; i
++) {
1271 chip
= &sym_dev_table
[i
];
1272 if (device_id
!= chip
->device_id
)
1274 if (revision
> chip
->revision_id
)
1282 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
1284 * Lookup the 64 bit DMA segments map.
1285 * This is only used if the direct mapping
1286 * has been unsuccessful.
1288 int sym_lookup_dmap(struct sym_hcb
*np
, u32 h
, int s
)
1295 /* Look up existing mappings */
1296 for (i
= SYM_DMAP_SIZE
-1; i
> 0; i
--) {
1297 if (h
== np
->dmap_bah
[i
])
1300 /* If direct mapping is free, get it */
1301 if (!np
->dmap_bah
[s
])
1303 /* Collision -> lookup free mappings */
1304 for (s
= SYM_DMAP_SIZE
-1; s
> 0; s
--) {
1305 if (!np
->dmap_bah
[s
])
1309 panic("sym: ran out of 64 bit DMA segment registers");
1312 np
->dmap_bah
[s
] = h
;
1318 * Update IO registers scratch C..R so they will be
1319 * in sync. with queued CCB expectations.
1321 static void sym_update_dmap_regs(struct sym_hcb
*np
)
1325 if (!np
->dmap_dirty
)
1327 o
= offsetof(struct sym_reg
, nc_scrx
[0]);
1328 for (i
= 0; i
< SYM_DMAP_SIZE
; i
++) {
1329 OUTL_OFF(np
, o
, np
->dmap_bah
[i
]);
1336 /* Enforce all the fiddly SPI rules and the chip limitations */
1337 static void sym_check_goals(struct sym_hcb
*np
, struct scsi_target
*starget
,
1338 struct sym_trans
*goal
)
1340 if (!spi_support_wide(starget
))
1343 if (!spi_support_sync(starget
)) {
1351 if (spi_support_dt(starget
)) {
1352 if (spi_support_dt_only(starget
))
1355 if (goal
->offset
== 0)
1361 /* Some targets fail to properly negotiate DT in SE mode */
1362 if ((np
->scsi_mode
!= SMODE_LVD
) || !(np
->features
& FE_U3EN
))
1366 /* all DT transfers must be wide */
1368 if (goal
->offset
> np
->maxoffs_dt
)
1369 goal
->offset
= np
->maxoffs_dt
;
1370 if (goal
->period
< np
->minsync_dt
)
1371 goal
->period
= np
->minsync_dt
;
1372 if (goal
->period
> np
->maxsync_dt
)
1373 goal
->period
= np
->maxsync_dt
;
1375 goal
->iu
= goal
->qas
= 0;
1376 if (goal
->offset
> np
->maxoffs
)
1377 goal
->offset
= np
->maxoffs
;
1378 if (goal
->period
< np
->minsync
)
1379 goal
->period
= np
->minsync
;
1380 if (goal
->period
> np
->maxsync
)
1381 goal
->period
= np
->maxsync
;
1386 * Prepare the next negotiation message if needed.
1388 * Fill in the part of message buffer that contains the
1389 * negotiation and the nego_status field of the CCB.
1390 * Returns the size of the message in bytes.
1392 static int sym_prepare_nego(struct sym_hcb
*np
, struct sym_ccb
*cp
, u_char
*msgptr
)
1394 struct sym_tcb
*tp
= &np
->target
[cp
->target
];
1395 struct scsi_target
*starget
= tp
->starget
;
1396 struct sym_trans
*goal
= &tp
->tgoal
;
1400 sym_check_goals(np
, starget
, goal
);
1403 * Many devices implement PPR in a buggy way, so only use it if we
1406 if (goal
->renego
== NS_PPR
|| (goal
->offset
&&
1407 (goal
->iu
|| goal
->dt
|| goal
->qas
|| (goal
->period
< 0xa)))) {
1409 } else if (goal
->renego
== NS_WIDE
|| goal
->width
) {
1411 } else if (goal
->renego
== NS_SYNC
|| goal
->offset
) {
1414 goal
->check_nego
= 0;
1420 msglen
+= spi_populate_sync_msg(msgptr
+ msglen
, goal
->period
,
1424 msglen
+= spi_populate_width_msg(msgptr
+ msglen
, goal
->width
);
1427 msglen
+= spi_populate_ppr_msg(msgptr
+ msglen
, goal
->period
,
1428 goal
->offset
, goal
->width
,
1429 (goal
->iu
? PPR_OPT_IU
: 0) |
1430 (goal
->dt
? PPR_OPT_DT
: 0) |
1431 (goal
->qas
? PPR_OPT_QAS
: 0));
1435 cp
->nego_status
= nego
;
1438 tp
->nego_cp
= cp
; /* Keep track a nego will be performed */
1439 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
1440 sym_print_nego_msg(np
, cp
->target
,
1441 nego
== NS_SYNC
? "sync msgout" :
1442 nego
== NS_WIDE
? "wide msgout" :
1443 "ppr msgout", msgptr
);
1451 * Insert a job into the start queue.
1453 void sym_put_start_queue(struct sym_hcb
*np
, struct sym_ccb
*cp
)
1457 #ifdef SYM_CONF_IARB_SUPPORT
1459 * If the previously queued CCB is not yet done,
1460 * set the IARB hint. The SCRIPTS will go with IARB
1461 * for this job when starting the previous one.
1462 * We leave devices a chance to win arbitration by
1463 * not using more than 'iarb_max' consecutive
1464 * immediate arbitrations.
1466 if (np
->last_cp
&& np
->iarb_count
< np
->iarb_max
) {
1467 np
->last_cp
->host_flags
|= HF_HINT_IARB
;
1475 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
1477 * Make SCRIPTS aware of the 64 bit DMA
1478 * segment registers not being up-to-date.
1481 cp
->host_xflags
|= HX_DMAP_DIRTY
;
1485 * Insert first the idle task and then our job.
1486 * The MBs should ensure proper ordering.
1488 qidx
= np
->squeueput
+ 2;
1489 if (qidx
>= MAX_QUEUE
*2) qidx
= 0;
1491 np
->squeue
[qidx
] = cpu_to_scr(np
->idletask_ba
);
1492 MEMORY_WRITE_BARRIER();
1493 np
->squeue
[np
->squeueput
] = cpu_to_scr(cp
->ccb_ba
);
1495 np
->squeueput
= qidx
;
1497 if (DEBUG_FLAGS
& DEBUG_QUEUE
)
1498 scmd_printk(KERN_DEBUG
, cp
->cmd
, "queuepos=%d\n",
1502 * Script processor may be waiting for reselect.
1505 MEMORY_WRITE_BARRIER();
1506 OUTB(np
, nc_istat
, SIGP
|np
->istat_sem
);
1509 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
1511 * Start next ready-to-start CCBs.
1513 void sym_start_next_ccbs(struct sym_hcb
*np
, struct sym_lcb
*lp
, int maxn
)
1519 * Paranoia, as usual. :-)
1521 assert(!lp
->started_tags
|| !lp
->started_no_tag
);
1524 * Try to start as many commands as asked by caller.
1525 * Prevent from having both tagged and untagged
1526 * commands queued to the device at the same time.
1529 qp
= sym_remque_head(&lp
->waiting_ccbq
);
1532 cp
= sym_que_entry(qp
, struct sym_ccb
, link2_ccbq
);
1533 if (cp
->tag
!= NO_TAG
) {
1534 if (lp
->started_no_tag
||
1535 lp
->started_tags
>= lp
->started_max
) {
1536 sym_insque_head(qp
, &lp
->waiting_ccbq
);
1539 lp
->itlq_tbl
[cp
->tag
] = cpu_to_scr(cp
->ccb_ba
);
1541 cpu_to_scr(SCRIPTA_BA(np
, resel_tag
));
1544 if (lp
->started_no_tag
|| lp
->started_tags
) {
1545 sym_insque_head(qp
, &lp
->waiting_ccbq
);
1548 lp
->head
.itl_task_sa
= cpu_to_scr(cp
->ccb_ba
);
1550 cpu_to_scr(SCRIPTA_BA(np
, resel_no_tag
));
1551 ++lp
->started_no_tag
;
1554 sym_insque_tail(qp
, &lp
->started_ccbq
);
1555 sym_put_start_queue(np
, cp
);
1558 #endif /* SYM_OPT_HANDLE_DEVICE_QUEUEING */
1561 * The chip may have completed jobs. Look at the DONE QUEUE.
1563 * On paper, memory read barriers may be needed here to
1564 * prevent out of order LOADs by the CPU from having
1565 * prefetched stale data prior to DMA having occurred.
1567 static int sym_wakeup_done (struct sym_hcb
*np
)
1576 /* MEMORY_READ_BARRIER(); */
1578 dsa
= scr_to_cpu(np
->dqueue
[i
]);
1582 if ((i
= i
+2) >= MAX_QUEUE
*2)
1585 cp
= sym_ccb_from_dsa(np
, dsa
);
1587 MEMORY_READ_BARRIER();
1588 sym_complete_ok (np
, cp
);
1592 printf ("%s: bad DSA (%x) in done queue.\n",
1593 sym_name(np
), (u_int
) dsa
);
1601 * Complete all CCBs queued to the COMP queue.
1603 * These CCBs are assumed:
1604 * - Not to be referenced either by devices or
1605 * SCRIPTS-related queues and datas.
1606 * - To have to be completed with an error condition
1609 * The device queue freeze count is incremented
1610 * for each CCB that does not prevent this.
1611 * This function is called when all CCBs involved
1612 * in error handling/recovery have been reaped.
1614 static void sym_flush_comp_queue(struct sym_hcb
*np
, int cam_status
)
1619 while ((qp
= sym_remque_head(&np
->comp_ccbq
)) != NULL
) {
1620 struct scsi_cmnd
*cmd
;
1621 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
1622 sym_insque_tail(&cp
->link_ccbq
, &np
->busy_ccbq
);
1623 /* Leave quiet CCBs waiting for resources */
1624 if (cp
->host_status
== HS_WAIT
)
1628 sym_set_cam_status(cmd
, cam_status
);
1629 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
1630 if (sym_get_cam_status(cmd
) == DID_SOFT_ERROR
) {
1631 struct sym_tcb
*tp
= &np
->target
[cp
->target
];
1632 struct sym_lcb
*lp
= sym_lp(tp
, cp
->lun
);
1634 sym_remque(&cp
->link2_ccbq
);
1635 sym_insque_tail(&cp
->link2_ccbq
,
1638 if (cp
->tag
!= NO_TAG
)
1641 --lp
->started_no_tag
;
1648 sym_free_ccb(np
, cp
);
1649 sym_xpt_done(np
, cmd
);
1654 * Complete all active CCBs with error.
1655 * Used on CHIP/SCSI RESET.
1657 static void sym_flush_busy_queue (struct sym_hcb
*np
, int cam_status
)
1660 * Move all active CCBs to the COMP queue
1661 * and flush this queue.
1663 sym_que_splice(&np
->busy_ccbq
, &np
->comp_ccbq
);
1664 sym_que_init(&np
->busy_ccbq
);
1665 sym_flush_comp_queue(np
, cam_status
);
1672 * 0: initialisation.
1673 * 1: SCSI BUS RESET delivered or received.
1674 * 2: SCSI BUS MODE changed.
1676 void sym_start_up(struct Scsi_Host
*shost
, int reason
)
1678 struct sym_data
*sym_data
= shost_priv(shost
);
1679 struct pci_dev
*pdev
= sym_data
->pdev
;
1680 struct sym_hcb
*np
= sym_data
->ncb
;
1685 * Reset chip if asked, otherwise just clear fifos.
1690 OUTB(np
, nc_stest3
, TE
|CSF
);
1691 OUTONB(np
, nc_ctest3
, CLF
);
1697 phys
= np
->squeue_ba
;
1698 for (i
= 0; i
< MAX_QUEUE
*2; i
+= 2) {
1699 np
->squeue
[i
] = cpu_to_scr(np
->idletask_ba
);
1700 np
->squeue
[i
+1] = cpu_to_scr(phys
+ (i
+2)*4);
1702 np
->squeue
[MAX_QUEUE
*2-1] = cpu_to_scr(phys
);
1705 * Start at first entry.
1712 phys
= np
->dqueue_ba
;
1713 for (i
= 0; i
< MAX_QUEUE
*2; i
+= 2) {
1715 np
->dqueue
[i
+1] = cpu_to_scr(phys
+ (i
+2)*4);
1717 np
->dqueue
[MAX_QUEUE
*2-1] = cpu_to_scr(phys
);
1720 * Start at first entry.
1725 * Install patches in scripts.
1726 * This also let point to first position the start
1727 * and done queue pointers used from SCRIPTS.
1729 np
->fw_patch(shost
);
1732 * Wakeup all pending jobs.
1734 sym_flush_busy_queue(np
, DID_RESET
);
1739 OUTB(np
, nc_istat
, 0x00); /* Remove Reset, abort */
1741 udelay(2000); /* The 895 needs time for the bus mode to settle */
1743 OUTB(np
, nc_scntl0
, np
->rv_scntl0
| 0xc0);
1744 /* full arb., ena parity, par->ATN */
1745 OUTB(np
, nc_scntl1
, 0x00); /* odd parity, and remove CRST!! */
1747 sym_selectclock(np
, np
->rv_scntl3
); /* Select SCSI clock */
1749 OUTB(np
, nc_scid
, RRE
|np
->myaddr
); /* Adapter SCSI address */
1750 OUTW(np
, nc_respid
, 1ul<<np
->myaddr
); /* Id to respond to */
1751 OUTB(np
, nc_istat
, SIGP
); /* Signal Process */
1752 OUTB(np
, nc_dmode
, np
->rv_dmode
); /* Burst length, dma mode */
1753 OUTB(np
, nc_ctest5
, np
->rv_ctest5
); /* Large fifo + large burst */
1755 OUTB(np
, nc_dcntl
, NOCOM
|np
->rv_dcntl
); /* Protect SFBR */
1756 OUTB(np
, nc_ctest3
, np
->rv_ctest3
); /* Write and invalidate */
1757 OUTB(np
, nc_ctest4
, np
->rv_ctest4
); /* Master parity checking */
1759 /* Extended Sreq/Sack filtering not supported on the C10 */
1760 if (np
->features
& FE_C10
)
1761 OUTB(np
, nc_stest2
, np
->rv_stest2
);
1763 OUTB(np
, nc_stest2
, EXT
|np
->rv_stest2
);
1765 OUTB(np
, nc_stest3
, TE
); /* TolerANT enable */
1766 OUTB(np
, nc_stime0
, 0x0c); /* HTH disabled STO 0.25 sec */
1769 * For now, disable AIP generation on C1010-66.
1771 if (pdev
->device
== PCI_DEVICE_ID_LSI_53C1010_66
)
1772 OUTB(np
, nc_aipcntl1
, DISAIP
);
1775 * C10101 rev. 0 errata.
1776 * Errant SGE's when in narrow. Write bits 4 & 5 of
1777 * STEST1 register to disable SGE. We probably should do
1778 * that from SCRIPTS for each selection/reselection, but
1779 * I just don't want. :)
1781 if (pdev
->device
== PCI_DEVICE_ID_LSI_53C1010_33
&&
1783 OUTB(np
, nc_stest1
, INB(np
, nc_stest1
) | 0x30);
1786 * DEL 441 - 53C876 Rev 5 - Part Number 609-0392787/2788 - ITEM 2.
1787 * Disable overlapped arbitration for some dual function devices,
1788 * regardless revision id (kind of post-chip-design feature. ;-))
1790 if (pdev
->device
== PCI_DEVICE_ID_NCR_53C875
)
1791 OUTB(np
, nc_ctest0
, (1<<5));
1792 else if (pdev
->device
== PCI_DEVICE_ID_NCR_53C896
)
1793 np
->rv_ccntl0
|= DPR
;
1796 * Write CCNTL0/CCNTL1 for chips capable of 64 bit addressing
1797 * and/or hardware phase mismatch, since only such chips
1798 * seem to support those IO registers.
1800 if (np
->features
& (FE_DAC
|FE_NOPM
)) {
1801 OUTB(np
, nc_ccntl0
, np
->rv_ccntl0
);
1802 OUTB(np
, nc_ccntl1
, np
->rv_ccntl1
);
1805 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
1807 * Set up scratch C and DRS IO registers to map the 32 bit
1808 * DMA address range our data structures are located in.
1811 np
->dmap_bah
[0] = 0; /* ??? */
1812 OUTL(np
, nc_scrx
[0], np
->dmap_bah
[0]);
1813 OUTL(np
, nc_drs
, np
->dmap_bah
[0]);
1818 * If phase mismatch handled by scripts (895A/896/1010),
1819 * set PM jump addresses.
1821 if (np
->features
& FE_NOPM
) {
1822 OUTL(np
, nc_pmjad1
, SCRIPTB_BA(np
, pm_handle
));
1823 OUTL(np
, nc_pmjad2
, SCRIPTB_BA(np
, pm_handle
));
1827 * Enable GPIO0 pin for writing if LED support from SCRIPTS.
1828 * Also set GPIO5 and clear GPIO6 if hardware LED control.
1830 if (np
->features
& FE_LED0
)
1831 OUTB(np
, nc_gpcntl
, INB(np
, nc_gpcntl
) & ~0x01);
1832 else if (np
->features
& FE_LEDC
)
1833 OUTB(np
, nc_gpcntl
, (INB(np
, nc_gpcntl
) & ~0x41) | 0x20);
1838 OUTW(np
, nc_sien
, STO
|HTH
|MA
|SGE
|UDC
|RST
|PAR
);
1839 OUTB(np
, nc_dien
, MDPE
|BF
|SSI
|SIR
|IID
);
1842 * For 895/6 enable SBMC interrupt and save current SCSI bus mode.
1843 * Try to eat the spurious SBMC interrupt that may occur when
1844 * we reset the chip but not the SCSI BUS (at initialization).
1846 if (np
->features
& (FE_ULTRA2
|FE_ULTRA3
)) {
1847 OUTONW(np
, nc_sien
, SBMC
);
1853 np
->scsi_mode
= INB(np
, nc_stest4
) & SMODE
;
1857 * Fill in target structure.
1858 * Reinitialize usrsync.
1859 * Reinitialize usrwide.
1860 * Prepare sync negotiation according to actual SCSI bus mode.
1862 for (i
=0;i
<SYM_CONF_MAX_TARGET
;i
++) {
1863 struct sym_tcb
*tp
= &np
->target
[i
];
1867 tp
->head
.wval
= np
->rv_scntl3
;
1870 tp
->lun0p
->to_clear
= 0;
1874 for (ln
= 1; ln
< SYM_CONF_MAX_LUN
; ln
++)
1876 tp
->lunmp
[ln
]->to_clear
= 0;
1881 * Download SCSI SCRIPTS to on-chip RAM if present,
1882 * and start script processor.
1883 * We do the download preferently from the CPU.
1884 * For platforms that may not support PCI memory mapping,
1885 * we use simple SCRIPTS that performs MEMORY MOVEs.
1887 phys
= SCRIPTA_BA(np
, init
);
1889 if (sym_verbose
>= 2)
1890 printf("%s: Downloading SCSI SCRIPTS.\n", sym_name(np
));
1891 memcpy_toio(np
->s
.ramaddr
, np
->scripta0
, np
->scripta_sz
);
1892 if (np
->features
& FE_RAM8K
) {
1893 memcpy_toio(np
->s
.ramaddr
+ 4096, np
->scriptb0
, np
->scriptb_sz
);
1894 phys
= scr_to_cpu(np
->scr_ram_seg
);
1895 OUTL(np
, nc_mmws
, phys
);
1896 OUTL(np
, nc_mmrs
, phys
);
1897 OUTL(np
, nc_sfs
, phys
);
1898 phys
= SCRIPTB_BA(np
, start64
);
1904 OUTL(np
, nc_dsa
, np
->hcb_ba
);
1908 * Notify the XPT about the RESET condition.
1911 sym_xpt_async_bus_reset(np
);
1915 * Switch trans mode for current job and its target.
1917 static void sym_settrans(struct sym_hcb
*np
, int target
, u_char opts
, u_char ofs
,
1918 u_char per
, u_char wide
, u_char div
, u_char fak
)
1921 u_char sval
, wval
, uval
;
1922 struct sym_tcb
*tp
= &np
->target
[target
];
1924 assert(target
== (INB(np
, nc_sdid
) & 0x0f));
1926 sval
= tp
->head
.sval
;
1927 wval
= tp
->head
.wval
;
1928 uval
= tp
->head
.uval
;
1933 if (!(np
->features
& FE_C10
))
1934 sval
= (sval
& ~0x1f) | ofs
;
1936 sval
= (sval
& ~0x3f) | ofs
;
1939 * Set the sync divisor and extra clock factor.
1942 wval
= (wval
& ~0x70) | ((div
+1) << 4);
1943 if (!(np
->features
& FE_C10
))
1944 sval
= (sval
& ~0xe0) | (fak
<< 5);
1946 uval
= uval
& ~(XCLKH_ST
|XCLKH_DT
|XCLKS_ST
|XCLKS_DT
);
1947 if (fak
>= 1) uval
|= (XCLKH_ST
|XCLKH_DT
);
1948 if (fak
>= 2) uval
|= (XCLKS_ST
|XCLKS_DT
);
1953 * Set the bus width.
1960 * Set misc. ultra enable bits.
1962 if (np
->features
& FE_C10
) {
1963 uval
= uval
& ~(U3EN
|AIPCKEN
);
1965 assert(np
->features
& FE_U3EN
);
1969 wval
= wval
& ~ULTRA
;
1970 if (per
<= 12) wval
|= ULTRA
;
1974 * Stop there if sync parameters are unchanged.
1976 if (tp
->head
.sval
== sval
&&
1977 tp
->head
.wval
== wval
&&
1978 tp
->head
.uval
== uval
)
1980 tp
->head
.sval
= sval
;
1981 tp
->head
.wval
= wval
;
1982 tp
->head
.uval
= uval
;
1985 * Disable extended Sreq/Sack filtering if per < 50.
1986 * Not supported on the C1010.
1988 if (per
< 50 && !(np
->features
& FE_C10
))
1989 OUTOFFB(np
, nc_stest2
, EXT
);
1992 * set actual value and sync_status
1994 OUTB(np
, nc_sxfer
, tp
->head
.sval
);
1995 OUTB(np
, nc_scntl3
, tp
->head
.wval
);
1997 if (np
->features
& FE_C10
) {
1998 OUTB(np
, nc_scntl4
, tp
->head
.uval
);
2002 * patch ALL busy ccbs of this target.
2004 FOR_EACH_QUEUED_ELEMENT(&np
->busy_ccbq
, qp
) {
2006 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
2007 if (cp
->target
!= target
)
2009 cp
->phys
.select
.sel_scntl3
= tp
->head
.wval
;
2010 cp
->phys
.select
.sel_sxfer
= tp
->head
.sval
;
2011 if (np
->features
& FE_C10
) {
2012 cp
->phys
.select
.sel_scntl4
= tp
->head
.uval
;
2017 static void sym_announce_transfer_rate(struct sym_tcb
*tp
)
2019 struct scsi_target
*starget
= tp
->starget
;
2021 if (tp
->tprint
.period
!= spi_period(starget
) ||
2022 tp
->tprint
.offset
!= spi_offset(starget
) ||
2023 tp
->tprint
.width
!= spi_width(starget
) ||
2024 tp
->tprint
.iu
!= spi_iu(starget
) ||
2025 tp
->tprint
.dt
!= spi_dt(starget
) ||
2026 tp
->tprint
.qas
!= spi_qas(starget
) ||
2027 !tp
->tprint
.check_nego
) {
2028 tp
->tprint
.period
= spi_period(starget
);
2029 tp
->tprint
.offset
= spi_offset(starget
);
2030 tp
->tprint
.width
= spi_width(starget
);
2031 tp
->tprint
.iu
= spi_iu(starget
);
2032 tp
->tprint
.dt
= spi_dt(starget
);
2033 tp
->tprint
.qas
= spi_qas(starget
);
2034 tp
->tprint
.check_nego
= 1;
2036 spi_display_xfer_agreement(starget
);
2041 * We received a WDTR.
2042 * Let everything be aware of the changes.
2044 static void sym_setwide(struct sym_hcb
*np
, int target
, u_char wide
)
2046 struct sym_tcb
*tp
= &np
->target
[target
];
2047 struct scsi_target
*starget
= tp
->starget
;
2049 sym_settrans(np
, target
, 0, 0, 0, wide
, 0, 0);
2052 tp
->tgoal
.renego
= NS_WIDE
;
2054 tp
->tgoal
.renego
= 0;
2055 tp
->tgoal
.check_nego
= 0;
2056 tp
->tgoal
.width
= wide
;
2057 spi_offset(starget
) = 0;
2058 spi_period(starget
) = 0;
2059 spi_width(starget
) = wide
;
2060 spi_iu(starget
) = 0;
2061 spi_dt(starget
) = 0;
2062 spi_qas(starget
) = 0;
2064 if (sym_verbose
>= 3)
2065 sym_announce_transfer_rate(tp
);
2069 * We received a SDTR.
2070 * Let everything be aware of the changes.
2073 sym_setsync(struct sym_hcb
*np
, int target
,
2074 u_char ofs
, u_char per
, u_char div
, u_char fak
)
2076 struct sym_tcb
*tp
= &np
->target
[target
];
2077 struct scsi_target
*starget
= tp
->starget
;
2078 u_char wide
= (tp
->head
.wval
& EWS
) ? BUS_16_BIT
: BUS_8_BIT
;
2080 sym_settrans(np
, target
, 0, ofs
, per
, wide
, div
, fak
);
2083 tp
->tgoal
.renego
= NS_WIDE
;
2085 tp
->tgoal
.renego
= NS_SYNC
;
2087 tp
->tgoal
.renego
= 0;
2088 spi_period(starget
) = per
;
2089 spi_offset(starget
) = ofs
;
2090 spi_iu(starget
) = spi_dt(starget
) = spi_qas(starget
) = 0;
2092 if (!tp
->tgoal
.dt
&& !tp
->tgoal
.iu
&& !tp
->tgoal
.qas
) {
2093 tp
->tgoal
.period
= per
;
2094 tp
->tgoal
.offset
= ofs
;
2095 tp
->tgoal
.check_nego
= 0;
2098 sym_announce_transfer_rate(tp
);
2102 * We received a PPR.
2103 * Let everything be aware of the changes.
2106 sym_setpprot(struct sym_hcb
*np
, int target
, u_char opts
, u_char ofs
,
2107 u_char per
, u_char wide
, u_char div
, u_char fak
)
2109 struct sym_tcb
*tp
= &np
->target
[target
];
2110 struct scsi_target
*starget
= tp
->starget
;
2112 sym_settrans(np
, target
, opts
, ofs
, per
, wide
, div
, fak
);
2115 tp
->tgoal
.renego
= NS_PPR
;
2117 tp
->tgoal
.renego
= 0;
2118 spi_width(starget
) = tp
->tgoal
.width
= wide
;
2119 spi_period(starget
) = tp
->tgoal
.period
= per
;
2120 spi_offset(starget
) = tp
->tgoal
.offset
= ofs
;
2121 spi_iu(starget
) = tp
->tgoal
.iu
= !!(opts
& PPR_OPT_IU
);
2122 spi_dt(starget
) = tp
->tgoal
.dt
= !!(opts
& PPR_OPT_DT
);
2123 spi_qas(starget
) = tp
->tgoal
.qas
= !!(opts
& PPR_OPT_QAS
);
2124 tp
->tgoal
.check_nego
= 0;
2126 sym_announce_transfer_rate(tp
);
2130 * generic recovery from scsi interrupt
2132 * The doc says that when the chip gets an SCSI interrupt,
2133 * it tries to stop in an orderly fashion, by completing
2134 * an instruction fetch that had started or by flushing
2135 * the DMA fifo for a write to memory that was executing.
2136 * Such a fashion is not enough to know if the instruction
2137 * that was just before the current DSP value has been
2140 * There are some small SCRIPTS sections that deal with
2141 * the start queue and the done queue that may break any
2142 * assomption from the C code if we are interrupted
2143 * inside, so we reset if this happens. Btw, since these
2144 * SCRIPTS sections are executed while the SCRIPTS hasn't
2145 * started SCSI operations, it is very unlikely to happen.
2147 * All the driver data structures are supposed to be
2148 * allocated from the same 4 GB memory window, so there
2149 * is a 1 to 1 relationship between DSA and driver data
2150 * structures. Since we are careful :) to invalidate the
2151 * DSA when we complete a command or when the SCRIPTS
2152 * pushes a DSA into a queue, we can trust it when it
2155 static void sym_recover_scsi_int (struct sym_hcb
*np
, u_char hsts
)
2157 u32 dsp
= INL(np
, nc_dsp
);
2158 u32 dsa
= INL(np
, nc_dsa
);
2159 struct sym_ccb
*cp
= sym_ccb_from_dsa(np
, dsa
);
2162 * If we haven't been interrupted inside the SCRIPTS
2163 * critical pathes, we can safely restart the SCRIPTS
2164 * and trust the DSA value if it matches a CCB.
2166 if ((!(dsp
> SCRIPTA_BA(np
, getjob_begin
) &&
2167 dsp
< SCRIPTA_BA(np
, getjob_end
) + 1)) &&
2168 (!(dsp
> SCRIPTA_BA(np
, ungetjob
) &&
2169 dsp
< SCRIPTA_BA(np
, reselect
) + 1)) &&
2170 (!(dsp
> SCRIPTB_BA(np
, sel_for_abort
) &&
2171 dsp
< SCRIPTB_BA(np
, sel_for_abort_1
) + 1)) &&
2172 (!(dsp
> SCRIPTA_BA(np
, done
) &&
2173 dsp
< SCRIPTA_BA(np
, done_end
) + 1))) {
2174 OUTB(np
, nc_ctest3
, np
->rv_ctest3
| CLF
); /* clear dma fifo */
2175 OUTB(np
, nc_stest3
, TE
|CSF
); /* clear scsi fifo */
2177 * If we have a CCB, let the SCRIPTS call us back for
2178 * the handling of the error with SCRATCHA filled with
2179 * STARTPOS. This way, we will be able to freeze the
2180 * device queue and requeue awaiting IOs.
2183 cp
->host_status
= hsts
;
2184 OUTL_DSP(np
, SCRIPTA_BA(np
, complete_error
));
2187 * Otherwise just restart the SCRIPTS.
2190 OUTL(np
, nc_dsa
, 0xffffff);
2191 OUTL_DSP(np
, SCRIPTA_BA(np
, start
));
2200 sym_start_reset(np
);
2204 * chip exception handler for selection timeout
2206 static void sym_int_sto (struct sym_hcb
*np
)
2208 u32 dsp
= INL(np
, nc_dsp
);
2210 if (DEBUG_FLAGS
& DEBUG_TINY
) printf ("T");
2212 if (dsp
== SCRIPTA_BA(np
, wf_sel_done
) + 8)
2213 sym_recover_scsi_int(np
, HS_SEL_TIMEOUT
);
2215 sym_start_reset(np
);
2219 * chip exception handler for unexpected disconnect
2221 static void sym_int_udc (struct sym_hcb
*np
)
2223 printf ("%s: unexpected disconnect\n", sym_name(np
));
2224 sym_recover_scsi_int(np
, HS_UNEXPECTED
);
2228 * chip exception handler for SCSI bus mode change
2230 * spi2-r12 11.2.3 says a transceiver mode change must
2231 * generate a reset event and a device that detects a reset
2232 * event shall initiate a hard reset. It says also that a
2233 * device that detects a mode change shall set data transfer
2234 * mode to eight bit asynchronous, etc...
2235 * So, just reinitializing all except chip should be enough.
2237 static void sym_int_sbmc(struct Scsi_Host
*shost
)
2239 struct sym_hcb
*np
= sym_get_hcb(shost
);
2240 u_char scsi_mode
= INB(np
, nc_stest4
) & SMODE
;
2245 printf("%s: SCSI BUS mode change from %s to %s.\n", sym_name(np
),
2246 sym_scsi_bus_mode(np
->scsi_mode
), sym_scsi_bus_mode(scsi_mode
));
2249 * Should suspend command processing for a few seconds and
2250 * reinitialize all except the chip.
2252 sym_start_up(shost
, 2);
2256 * chip exception handler for SCSI parity error.
2258 * When the chip detects a SCSI parity error and is
2259 * currently executing a (CH)MOV instruction, it does
2260 * not interrupt immediately, but tries to finish the
2261 * transfer of the current scatter entry before
2262 * interrupting. The following situations may occur:
2264 * - The complete scatter entry has been transferred
2265 * without the device having changed phase.
2266 * The chip will then interrupt with the DSP pointing
2267 * to the instruction that follows the MOV.
2269 * - A phase mismatch occurs before the MOV finished
2270 * and phase errors are to be handled by the C code.
2271 * The chip will then interrupt with both PAR and MA
2274 * - A phase mismatch occurs before the MOV finished and
2275 * phase errors are to be handled by SCRIPTS.
2276 * The chip will load the DSP with the phase mismatch
2277 * JUMP address and interrupt the host processor.
2279 static void sym_int_par (struct sym_hcb
*np
, u_short sist
)
2281 u_char hsts
= INB(np
, HS_PRT
);
2282 u32 dsp
= INL(np
, nc_dsp
);
2283 u32 dbc
= INL(np
, nc_dbc
);
2284 u32 dsa
= INL(np
, nc_dsa
);
2285 u_char sbcl
= INB(np
, nc_sbcl
);
2286 u_char cmd
= dbc
>> 24;
2287 int phase
= cmd
& 7;
2288 struct sym_ccb
*cp
= sym_ccb_from_dsa(np
, dsa
);
2290 if (printk_ratelimit())
2291 printf("%s: SCSI parity error detected: SCR1=%d DBC=%x SBCL=%x\n",
2292 sym_name(np
), hsts
, dbc
, sbcl
);
2295 * Check that the chip is connected to the SCSI BUS.
2297 if (!(INB(np
, nc_scntl1
) & ISCON
)) {
2298 sym_recover_scsi_int(np
, HS_UNEXPECTED
);
2303 * If the nexus is not clearly identified, reset the bus.
2304 * We will try to do better later.
2310 * Check instruction was a MOV, direction was INPUT and
2313 if ((cmd
& 0xc0) || !(phase
& 1) || !(sbcl
& 0x8))
2317 * Keep track of the parity error.
2319 OUTONB(np
, HF_PRT
, HF_EXT_ERR
);
2320 cp
->xerr_status
|= XE_PARITY_ERR
;
2323 * Prepare the message to send to the device.
2325 np
->msgout
[0] = (phase
== 7) ? M_PARITY
: M_ID_ERROR
;
2328 * If the old phase was DATA IN phase, we have to deal with
2329 * the 3 situations described above.
2330 * For other input phases (MSG IN and STATUS), the device
2331 * must resend the whole thing that failed parity checking
2332 * or signal error. So, jumping to dispatcher should be OK.
2334 if (phase
== 1 || phase
== 5) {
2335 /* Phase mismatch handled by SCRIPTS */
2336 if (dsp
== SCRIPTB_BA(np
, pm_handle
))
2338 /* Phase mismatch handled by the C code */
2341 /* No phase mismatch occurred */
2343 sym_set_script_dp (np
, cp
, dsp
);
2344 OUTL_DSP(np
, SCRIPTA_BA(np
, dispatch
));
2347 else if (phase
== 7) /* We definitely cannot handle parity errors */
2348 goto reset_all
; /* path and various message anticipations. */
2350 OUTL_DSP(np
, SCRIPTA_BA(np
, dispatch
));
2354 sym_start_reset(np
);
2359 * chip exception handler for phase errors.
2361 * We have to construct a new transfer descriptor,
2362 * to transfer the rest of the current block.
2364 static void sym_int_ma (struct sym_hcb
*np
)
2377 u_char hflags
, hflags0
;
2381 dsp
= INL(np
, nc_dsp
);
2382 dbc
= INL(np
, nc_dbc
);
2383 dsa
= INL(np
, nc_dsa
);
2386 rest
= dbc
& 0xffffff;
2390 * locate matching cp if any.
2392 cp
= sym_ccb_from_dsa(np
, dsa
);
2395 * Donnot take into account dma fifo and various buffers in
2396 * INPUT phase since the chip flushes everything before
2397 * raising the MA interrupt for interrupted INPUT phases.
2398 * For DATA IN phase, we will check for the SWIDE later.
2400 if ((cmd
& 7) != 1 && (cmd
& 7) != 5) {
2403 if (np
->features
& FE_DFBC
)
2404 delta
= INW(np
, nc_dfbc
);
2409 * Read DFIFO, CTEST[4-6] using 1 PCI bus ownership.
2411 dfifo
= INL(np
, nc_dfifo
);
2414 * Calculate remaining bytes in DMA fifo.
2415 * (CTEST5 = dfifo >> 16)
2417 if (dfifo
& (DFS
<< 16))
2418 delta
= ((((dfifo
>> 8) & 0x300) |
2419 (dfifo
& 0xff)) - rest
) & 0x3ff;
2421 delta
= ((dfifo
& 0xff) - rest
) & 0x7f;
2425 * The data in the dma fifo has not been transfered to
2426 * the target -> add the amount to the rest
2427 * and clear the data.
2428 * Check the sstat2 register in case of wide transfer.
2431 ss0
= INB(np
, nc_sstat0
);
2432 if (ss0
& OLF
) rest
++;
2433 if (!(np
->features
& FE_C10
))
2434 if (ss0
& ORF
) rest
++;
2435 if (cp
&& (cp
->phys
.select
.sel_scntl3
& EWS
)) {
2436 ss2
= INB(np
, nc_sstat2
);
2437 if (ss2
& OLF1
) rest
++;
2438 if (!(np
->features
& FE_C10
))
2439 if (ss2
& ORF1
) rest
++;
2445 OUTB(np
, nc_ctest3
, np
->rv_ctest3
| CLF
); /* dma fifo */
2446 OUTB(np
, nc_stest3
, TE
|CSF
); /* scsi fifo */
2450 * log the information
2452 if (DEBUG_FLAGS
& (DEBUG_TINY
|DEBUG_PHASE
))
2453 printf ("P%x%x RL=%d D=%d ", cmd
&7, INB(np
, nc_sbcl
)&7,
2454 (unsigned) rest
, (unsigned) delta
);
2457 * try to find the interrupted script command,
2458 * and the address at which to continue.
2462 if (dsp
> np
->scripta_ba
&&
2463 dsp
<= np
->scripta_ba
+ np
->scripta_sz
) {
2464 vdsp
= (u32
*)((char*)np
->scripta0
+ (dsp
-np
->scripta_ba
-8));
2467 else if (dsp
> np
->scriptb_ba
&&
2468 dsp
<= np
->scriptb_ba
+ np
->scriptb_sz
) {
2469 vdsp
= (u32
*)((char*)np
->scriptb0
+ (dsp
-np
->scriptb_ba
-8));
2474 * log the information
2476 if (DEBUG_FLAGS
& DEBUG_PHASE
) {
2477 printf ("\nCP=%p DSP=%x NXT=%x VDSP=%p CMD=%x ",
2478 cp
, (unsigned)dsp
, (unsigned)nxtdsp
, vdsp
, cmd
);
2482 printf ("%s: interrupted SCRIPT address not found.\n",
2488 printf ("%s: SCSI phase error fixup: CCB already dequeued.\n",
2494 * get old startaddress and old length.
2496 oadr
= scr_to_cpu(vdsp
[1]);
2498 if (cmd
& 0x10) { /* Table indirect */
2499 tblp
= (u32
*) ((char*) &cp
->phys
+ oadr
);
2500 olen
= scr_to_cpu(tblp
[0]);
2501 oadr
= scr_to_cpu(tblp
[1]);
2504 olen
= scr_to_cpu(vdsp
[0]) & 0xffffff;
2507 if (DEBUG_FLAGS
& DEBUG_PHASE
) {
2508 printf ("OCMD=%x\nTBLP=%p OLEN=%x OADR=%x\n",
2509 (unsigned) (scr_to_cpu(vdsp
[0]) >> 24),
2516 * check cmd against assumed interrupted script command.
2517 * If dt data phase, the MOVE instruction hasn't bit 4 of
2520 if (((cmd
& 2) ? cmd
: (cmd
& ~4)) != (scr_to_cpu(vdsp
[0]) >> 24)) {
2521 sym_print_addr(cp
->cmd
,
2522 "internal error: cmd=%02x != %02x=(vdsp[0] >> 24)\n",
2523 cmd
, scr_to_cpu(vdsp
[0]) >> 24);
2529 * if old phase not dataphase, leave here.
2532 sym_print_addr(cp
->cmd
,
2533 "phase change %x-%x %d@%08x resid=%d.\n",
2534 cmd
&7, INB(np
, nc_sbcl
)&7, (unsigned)olen
,
2535 (unsigned)oadr
, (unsigned)rest
);
2536 goto unexpected_phase
;
2540 * Choose the correct PM save area.
2542 * Look at the PM_SAVE SCRIPT if you want to understand
2543 * this stuff. The equivalent code is implemented in
2544 * SCRIPTS for the 895A, 896 and 1010 that are able to
2545 * handle PM from the SCRIPTS processor.
2547 hflags0
= INB(np
, HF_PRT
);
2550 if (hflags
& (HF_IN_PM0
| HF_IN_PM1
| HF_DP_SAVED
)) {
2551 if (hflags
& HF_IN_PM0
)
2552 nxtdsp
= scr_to_cpu(cp
->phys
.pm0
.ret
);
2553 else if (hflags
& HF_IN_PM1
)
2554 nxtdsp
= scr_to_cpu(cp
->phys
.pm1
.ret
);
2556 if (hflags
& HF_DP_SAVED
)
2557 hflags
^= HF_ACT_PM
;
2560 if (!(hflags
& HF_ACT_PM
)) {
2562 newcmd
= SCRIPTA_BA(np
, pm0_data
);
2566 newcmd
= SCRIPTA_BA(np
, pm1_data
);
2569 hflags
&= ~(HF_IN_PM0
| HF_IN_PM1
| HF_DP_SAVED
);
2570 if (hflags
!= hflags0
)
2571 OUTB(np
, HF_PRT
, hflags
);
2574 * fillin the phase mismatch context
2576 pm
->sg
.addr
= cpu_to_scr(oadr
+ olen
- rest
);
2577 pm
->sg
.size
= cpu_to_scr(rest
);
2578 pm
->ret
= cpu_to_scr(nxtdsp
);
2581 * If we have a SWIDE,
2582 * - prepare the address to write the SWIDE from SCRIPTS,
2583 * - compute the SCRIPTS address to restart from,
2584 * - move current data pointer context by one byte.
2586 nxtdsp
= SCRIPTA_BA(np
, dispatch
);
2587 if ((cmd
& 7) == 1 && cp
&& (cp
->phys
.select
.sel_scntl3
& EWS
) &&
2588 (INB(np
, nc_scntl2
) & WSR
)) {
2592 * Set up the table indirect for the MOVE
2593 * of the residual byte and adjust the data
2596 tmp
= scr_to_cpu(pm
->sg
.addr
);
2597 cp
->phys
.wresid
.addr
= cpu_to_scr(tmp
);
2598 pm
->sg
.addr
= cpu_to_scr(tmp
+ 1);
2599 tmp
= scr_to_cpu(pm
->sg
.size
);
2600 cp
->phys
.wresid
.size
= cpu_to_scr((tmp
&0xff000000) | 1);
2601 pm
->sg
.size
= cpu_to_scr(tmp
- 1);
2604 * If only the residual byte is to be moved,
2605 * no PM context is needed.
2607 if ((tmp
&0xffffff) == 1)
2611 * Prepare the address of SCRIPTS that will
2612 * move the residual byte to memory.
2614 nxtdsp
= SCRIPTB_BA(np
, wsr_ma_helper
);
2617 if (DEBUG_FLAGS
& DEBUG_PHASE
) {
2618 sym_print_addr(cp
->cmd
, "PM %x %x %x / %x %x %x.\n",
2619 hflags0
, hflags
, newcmd
,
2620 (unsigned)scr_to_cpu(pm
->sg
.addr
),
2621 (unsigned)scr_to_cpu(pm
->sg
.size
),
2622 (unsigned)scr_to_cpu(pm
->ret
));
2626 * Restart the SCRIPTS processor.
2628 sym_set_script_dp (np
, cp
, newcmd
);
2629 OUTL_DSP(np
, nxtdsp
);
2633 * Unexpected phase changes that occurs when the current phase
2634 * is not a DATA IN or DATA OUT phase are due to error conditions.
2635 * Such event may only happen when the SCRIPTS is using a
2636 * multibyte SCSI MOVE.
2638 * Phase change Some possible cause
2640 * COMMAND --> MSG IN SCSI parity error detected by target.
2641 * COMMAND --> STATUS Bad command or refused by target.
2642 * MSG OUT --> MSG IN Message rejected by target.
2643 * MSG OUT --> COMMAND Bogus target that discards extended
2644 * negotiation messages.
2646 * The code below does not care of the new phase and so
2647 * trusts the target. Why to annoy it ?
2648 * If the interrupted phase is COMMAND phase, we restart at
2650 * If a target does not get all the messages after selection,
2651 * the code assumes blindly that the target discards extended
2652 * messages and clears the negotiation status.
2653 * If the target does not want all our response to negotiation,
2654 * we force a SIR_NEGO_PROTO interrupt (it is a hack that avoids
2655 * bloat for such a should_not_happen situation).
2656 * In all other situation, we reset the BUS.
2657 * Are these assumptions reasonable ? (Wait and see ...)
2664 case 2: /* COMMAND phase */
2665 nxtdsp
= SCRIPTA_BA(np
, dispatch
);
2667 case 6: /* MSG OUT phase */
2669 * If the device may want to use untagged when we want
2670 * tagged, we prepare an IDENTIFY without disc. granted,
2671 * since we will not be able to handle reselect.
2672 * Otherwise, we just don't care.
2674 if (dsp
== SCRIPTA_BA(np
, send_ident
)) {
2675 if (cp
->tag
!= NO_TAG
&& olen
- rest
<= 3) {
2676 cp
->host_status
= HS_BUSY
;
2677 np
->msgout
[0] = IDENTIFY(0, cp
->lun
);
2678 nxtdsp
= SCRIPTB_BA(np
, ident_break_atn
);
2681 nxtdsp
= SCRIPTB_BA(np
, ident_break
);
2683 else if (dsp
== SCRIPTB_BA(np
, send_wdtr
) ||
2684 dsp
== SCRIPTB_BA(np
, send_sdtr
) ||
2685 dsp
== SCRIPTB_BA(np
, send_ppr
)) {
2686 nxtdsp
= SCRIPTB_BA(np
, nego_bad_phase
);
2687 if (dsp
== SCRIPTB_BA(np
, send_ppr
)) {
2688 struct scsi_device
*dev
= cp
->cmd
->device
;
2696 OUTL_DSP(np
, nxtdsp
);
2701 sym_start_reset(np
);
2705 * chip interrupt handler
2707 * In normal situations, interrupt conditions occur one at
2708 * a time. But when something bad happens on the SCSI BUS,
2709 * the chip may raise several interrupt flags before
2710 * stopping and interrupting the CPU. The additionnal
2711 * interrupt flags are stacked in some extra registers
2712 * after the SIP and/or DIP flag has been raised in the
2713 * ISTAT. After the CPU has read the interrupt condition
2714 * flag from SIST or DSTAT, the chip unstacks the other
2715 * interrupt flags and sets the corresponding bits in
2716 * SIST or DSTAT. Since the chip starts stacking once the
2717 * SIP or DIP flag is set, there is a small window of time
2718 * where the stacking does not occur.
2720 * Typically, multiple interrupt conditions may happen in
2721 * the following situations:
2723 * - SCSI parity error + Phase mismatch (PAR|MA)
2724 * When an parity error is detected in input phase
2725 * and the device switches to msg-in phase inside a
2727 * - SCSI parity error + Unexpected disconnect (PAR|UDC)
2728 * When a stupid device does not want to handle the
2729 * recovery of an SCSI parity error.
2730 * - Some combinations of STO, PAR, UDC, ...
2731 * When using non compliant SCSI stuff, when user is
2732 * doing non compliant hot tampering on the BUS, when
2733 * something really bad happens to a device, etc ...
2735 * The heuristic suggested by SYMBIOS to handle
2736 * multiple interrupts is to try unstacking all
2737 * interrupts conditions and to handle them on some
2738 * priority based on error severity.
2739 * This will work when the unstacking has been
2740 * successful, but we cannot be 100 % sure of that,
2741 * since the CPU may have been faster to unstack than
2742 * the chip is able to stack. Hmmm ... But it seems that
2743 * such a situation is very unlikely to happen.
2745 * If this happen, for example STO caught by the CPU
2746 * then UDC happenning before the CPU have restarted
2747 * the SCRIPTS, the driver may wrongly complete the
2748 * same command on UDC, since the SCRIPTS didn't restart
2749 * and the DSA still points to the same command.
2750 * We avoid this situation by setting the DSA to an
2751 * invalid value when the CCB is completed and before
2752 * restarting the SCRIPTS.
2754 * Another issue is that we need some section of our
2755 * recovery procedures to be somehow uninterruptible but
2756 * the SCRIPTS processor does not provides such a
2757 * feature. For this reason, we handle recovery preferently
2758 * from the C code and check against some SCRIPTS critical
2759 * sections from the C code.
2761 * Hopefully, the interrupt handling of the driver is now
2762 * able to resist to weird BUS error conditions, but donnot
2763 * ask me for any guarantee that it will never fail. :-)
2764 * Use at your own decision and risk.
2767 irqreturn_t
sym_interrupt(struct Scsi_Host
*shost
)
2769 struct sym_data
*sym_data
= shost_priv(shost
);
2770 struct sym_hcb
*np
= sym_data
->ncb
;
2771 struct pci_dev
*pdev
= sym_data
->pdev
;
2772 u_char istat
, istatc
;
2777 * interrupt on the fly ?
2778 * (SCRIPTS may still be running)
2780 * A `dummy read' is needed to ensure that the
2781 * clear of the INTF flag reaches the device
2782 * and that posted writes are flushed to memory
2783 * before the scanning of the DONE queue.
2784 * Note that SCRIPTS also (dummy) read to memory
2785 * prior to deliver the INTF interrupt condition.
2787 istat
= INB(np
, nc_istat
);
2789 OUTB(np
, nc_istat
, (istat
& SIGP
) | INTF
| np
->istat_sem
);
2790 istat
|= INB(np
, nc_istat
); /* DUMMY READ */
2791 if (DEBUG_FLAGS
& DEBUG_TINY
) printf ("F ");
2792 sym_wakeup_done(np
);
2795 if (!(istat
& (SIP
|DIP
)))
2796 return (istat
& INTF
) ? IRQ_HANDLED
: IRQ_NONE
;
2800 * PAR and MA interrupts may occur at the same time,
2801 * and we need to know of both in order to handle
2802 * this situation properly. We try to unstack SCSI
2803 * interrupts for that reason. BTW, I dislike a LOT
2804 * such a loop inside the interrupt routine.
2805 * Even if DMA interrupt stacking is very unlikely to
2806 * happen, we also try unstacking these ones, since
2807 * this has no performance impact.
2814 sist
|= INW(np
, nc_sist
);
2816 dstat
|= INB(np
, nc_dstat
);
2817 istatc
= INB(np
, nc_istat
);
2820 /* Prevent deadlock waiting on a condition that may
2822 if (unlikely(sist
== 0xffff && dstat
== 0xff)) {
2823 if (pci_channel_offline(pdev
))
2826 } while (istatc
& (SIP
|DIP
));
2828 if (DEBUG_FLAGS
& DEBUG_TINY
)
2829 printf ("<%d|%x:%x|%x:%x>",
2830 (int)INB(np
, nc_scr0
),
2832 (unsigned)INL(np
, nc_dsp
),
2833 (unsigned)INL(np
, nc_dbc
));
2835 * On paper, a memory read barrier may be needed here to
2836 * prevent out of order LOADs by the CPU from having
2837 * prefetched stale data prior to DMA having occurred.
2838 * And since we are paranoid ... :)
2840 MEMORY_READ_BARRIER();
2843 * First, interrupts we want to service cleanly.
2845 * Phase mismatch (MA) is the most frequent interrupt
2846 * for chip earlier than the 896 and so we have to service
2847 * it as quickly as possible.
2848 * A SCSI parity error (PAR) may be combined with a phase
2849 * mismatch condition (MA).
2850 * Programmed interrupts (SIR) are used to call the C code
2852 * The single step interrupt (SSI) is not used in this
2855 if (!(sist
& (STO
|GEN
|HTH
|SGE
|UDC
|SBMC
|RST
)) &&
2856 !(dstat
& (MDPE
|BF
|ABRT
|IID
))) {
2857 if (sist
& PAR
) sym_int_par (np
, sist
);
2858 else if (sist
& MA
) sym_int_ma (np
);
2859 else if (dstat
& SIR
) sym_int_sir(np
);
2860 else if (dstat
& SSI
) OUTONB_STD();
2861 else goto unknown_int
;
2866 * Now, interrupts that donnot happen in normal
2867 * situations and that we may need to recover from.
2869 * On SCSI RESET (RST), we reset everything.
2870 * On SCSI BUS MODE CHANGE (SBMC), we complete all
2871 * active CCBs with RESET status, prepare all devices
2872 * for negotiating again and restart the SCRIPTS.
2873 * On STO and UDC, we complete the CCB with the corres-
2874 * ponding status and restart the SCRIPTS.
2877 printf("%s: SCSI BUS reset detected.\n", sym_name(np
));
2878 sym_start_up(shost
, 1);
2882 OUTB(np
, nc_ctest3
, np
->rv_ctest3
| CLF
); /* clear dma fifo */
2883 OUTB(np
, nc_stest3
, TE
|CSF
); /* clear scsi fifo */
2885 if (!(sist
& (GEN
|HTH
|SGE
)) &&
2886 !(dstat
& (MDPE
|BF
|ABRT
|IID
))) {
2887 if (sist
& SBMC
) sym_int_sbmc(shost
);
2888 else if (sist
& STO
) sym_int_sto (np
);
2889 else if (sist
& UDC
) sym_int_udc (np
);
2890 else goto unknown_int
;
2895 * Now, interrupts we are not able to recover cleanly.
2897 * Log message for hard errors.
2901 sym_log_hard_error(shost
, sist
, dstat
);
2903 if ((sist
& (GEN
|HTH
|SGE
)) ||
2904 (dstat
& (MDPE
|BF
|ABRT
|IID
))) {
2905 sym_start_reset(np
);
2911 * We just miss the cause of the interrupt. :(
2912 * Print a message. The timeout will do the real work.
2914 printf( "%s: unknown interrupt(s) ignored, "
2915 "ISTAT=0x%x DSTAT=0x%x SIST=0x%x\n",
2916 sym_name(np
), istat
, dstat
, sist
);
2921 * Dequeue from the START queue all CCBs that match
2922 * a given target/lun/task condition (-1 means all),
2923 * and move them from the BUSY queue to the COMP queue
2924 * with DID_SOFT_ERROR status condition.
2925 * This function is used during error handling/recovery.
2926 * It is called with SCRIPTS not running.
2929 sym_dequeue_from_squeue(struct sym_hcb
*np
, int i
, int target
, int lun
, int task
)
2935 * Make sure the starting index is within range.
2937 assert((i
>= 0) && (i
< 2*MAX_QUEUE
));
2940 * Walk until end of START queue and dequeue every job
2941 * that matches the target/lun/task condition.
2944 while (i
!= np
->squeueput
) {
2945 cp
= sym_ccb_from_dsa(np
, scr_to_cpu(np
->squeue
[i
]));
2947 #ifdef SYM_CONF_IARB_SUPPORT
2948 /* Forget hints for IARB, they may be no longer relevant */
2949 cp
->host_flags
&= ~HF_HINT_IARB
;
2951 if ((target
== -1 || cp
->target
== target
) &&
2952 (lun
== -1 || cp
->lun
== lun
) &&
2953 (task
== -1 || cp
->tag
== task
)) {
2954 sym_set_cam_status(cp
->cmd
, DID_SOFT_ERROR
);
2955 sym_remque(&cp
->link_ccbq
);
2956 sym_insque_tail(&cp
->link_ccbq
, &np
->comp_ccbq
);
2960 np
->squeue
[j
] = np
->squeue
[i
];
2961 if ((j
+= 2) >= MAX_QUEUE
*2) j
= 0;
2963 if ((i
+= 2) >= MAX_QUEUE
*2) i
= 0;
2965 if (i
!= j
) /* Copy back the idle task if needed */
2966 np
->squeue
[j
] = np
->squeue
[i
];
2967 np
->squeueput
= j
; /* Update our current start queue pointer */
2973 * chip handler for bad SCSI status condition
2975 * In case of bad SCSI status, we unqueue all the tasks
2976 * currently queued to the controller but not yet started
2977 * and then restart the SCRIPTS processor immediately.
2979 * QUEUE FULL and BUSY conditions are handled the same way.
2980 * Basically all the not yet started tasks are requeued in
2981 * device queue and the queue is frozen until a completion.
2983 * For CHECK CONDITION and COMMAND TERMINATED status, we use
2984 * the CCB of the failed command to prepare a REQUEST SENSE
2985 * SCSI command and queue it to the controller queue.
2987 * SCRATCHA is assumed to have been loaded with STARTPOS
2988 * before the SCRIPTS called the C code.
2990 static void sym_sir_bad_scsi_status(struct sym_hcb
*np
, int num
, struct sym_ccb
*cp
)
2993 u_char s_status
= cp
->ssss_status
;
2994 u_char h_flags
= cp
->host_flags
;
2999 * Compute the index of the next job to start from SCRIPTS.
3001 i
= (INL(np
, nc_scratcha
) - np
->squeue_ba
) / 4;
3004 * The last CCB queued used for IARB hint may be
3005 * no longer relevant. Forget it.
3007 #ifdef SYM_CONF_IARB_SUPPORT
3013 * Now deal with the SCSI status.
3018 if (sym_verbose
>= 2) {
3019 sym_print_addr(cp
->cmd
, "%s\n",
3020 s_status
== S_BUSY
? "BUSY" : "QUEUE FULL\n");
3022 default: /* S_INT, S_INT_COND_MET, S_CONFLICT */
3023 sym_complete_error (np
, cp
);
3028 * If we get an SCSI error when requesting sense, give up.
3030 if (h_flags
& HF_SENSE
) {
3031 sym_complete_error (np
, cp
);
3036 * Dequeue all queued CCBs for that device not yet started,
3037 * and restart the SCRIPTS processor immediately.
3039 sym_dequeue_from_squeue(np
, i
, cp
->target
, cp
->lun
, -1);
3040 OUTL_DSP(np
, SCRIPTA_BA(np
, start
));
3043 * Save some info of the actual IO.
3044 * Compute the data residual.
3046 cp
->sv_scsi_status
= cp
->ssss_status
;
3047 cp
->sv_xerr_status
= cp
->xerr_status
;
3048 cp
->sv_resid
= sym_compute_residual(np
, cp
);
3051 * Prepare all needed data structures for
3052 * requesting sense data.
3055 cp
->scsi_smsg2
[0] = IDENTIFY(0, cp
->lun
);
3059 * If we are currently using anything different from
3060 * async. 8 bit data transfers with that target,
3061 * start a negotiation, since the device may want
3062 * to report us a UNIT ATTENTION condition due to
3063 * a cause we currently ignore, and we donnot want
3064 * to be stuck with WIDE and/or SYNC data transfer.
3066 * cp->nego_status is filled by sym_prepare_nego().
3068 cp
->nego_status
= 0;
3069 msglen
+= sym_prepare_nego(np
, cp
, &cp
->scsi_smsg2
[msglen
]);
3071 * Message table indirect structure.
3073 cp
->phys
.smsg
.addr
= CCB_BA(cp
, scsi_smsg2
);
3074 cp
->phys
.smsg
.size
= cpu_to_scr(msglen
);
3079 cp
->phys
.cmd
.addr
= CCB_BA(cp
, sensecmd
);
3080 cp
->phys
.cmd
.size
= cpu_to_scr(6);
3083 * patch requested size into sense command
3085 cp
->sensecmd
[0] = REQUEST_SENSE
;
3086 cp
->sensecmd
[1] = 0;
3087 if (cp
->cmd
->device
->scsi_level
<= SCSI_2
&& cp
->lun
<= 7)
3088 cp
->sensecmd
[1] = cp
->lun
<< 5;
3089 cp
->sensecmd
[4] = SYM_SNS_BBUF_LEN
;
3090 cp
->data_len
= SYM_SNS_BBUF_LEN
;
3095 memset(cp
->sns_bbuf
, 0, SYM_SNS_BBUF_LEN
);
3096 cp
->phys
.sense
.addr
= CCB_BA(cp
, sns_bbuf
);
3097 cp
->phys
.sense
.size
= cpu_to_scr(SYM_SNS_BBUF_LEN
);
3100 * requeue the command.
3102 startp
= SCRIPTB_BA(np
, sdata_in
);
3104 cp
->phys
.head
.savep
= cpu_to_scr(startp
);
3105 cp
->phys
.head
.lastp
= cpu_to_scr(startp
);
3106 cp
->startp
= cpu_to_scr(startp
);
3107 cp
->goalp
= cpu_to_scr(startp
+ 16);
3109 cp
->host_xflags
= 0;
3110 cp
->host_status
= cp
->nego_status
? HS_NEGOTIATE
: HS_BUSY
;
3111 cp
->ssss_status
= S_ILLEGAL
;
3112 cp
->host_flags
= (HF_SENSE
|HF_DATA_IN
);
3113 cp
->xerr_status
= 0;
3114 cp
->extra_bytes
= 0;
3116 cp
->phys
.head
.go
.start
= cpu_to_scr(SCRIPTA_BA(np
, select
));
3119 * Requeue the command.
3121 sym_put_start_queue(np
, cp
);
3124 * Give back to upper layer everything we have dequeued.
3126 sym_flush_comp_queue(np
, 0);
3132 * After a device has accepted some management message
3133 * as BUS DEVICE RESET, ABORT TASK, etc ..., or when
3134 * a device signals a UNIT ATTENTION condition, some
3135 * tasks are thrown away by the device. We are required
3136 * to reflect that on our tasks list since the device
3137 * will never complete these tasks.
3139 * This function move from the BUSY queue to the COMP
3140 * queue all disconnected CCBs for a given target that
3141 * match the following criteria:
3142 * - lun=-1 means any logical UNIT otherwise a given one.
3143 * - task=-1 means any task, otherwise a given one.
3145 int sym_clear_tasks(struct sym_hcb
*np
, int cam_status
, int target
, int lun
, int task
)
3147 SYM_QUEHEAD qtmp
, *qp
;
3152 * Move the entire BUSY queue to our temporary queue.
3154 sym_que_init(&qtmp
);
3155 sym_que_splice(&np
->busy_ccbq
, &qtmp
);
3156 sym_que_init(&np
->busy_ccbq
);
3159 * Put all CCBs that matches our criteria into
3160 * the COMP queue and put back other ones into
3163 while ((qp
= sym_remque_head(&qtmp
)) != NULL
) {
3164 struct scsi_cmnd
*cmd
;
3165 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
3167 if (cp
->host_status
!= HS_DISCONNECT
||
3168 cp
->target
!= target
||
3169 (lun
!= -1 && cp
->lun
!= lun
) ||
3171 (cp
->tag
!= NO_TAG
&& cp
->scsi_smsg
[2] != task
))) {
3172 sym_insque_tail(&cp
->link_ccbq
, &np
->busy_ccbq
);
3175 sym_insque_tail(&cp
->link_ccbq
, &np
->comp_ccbq
);
3177 /* Preserve the software timeout condition */
3178 if (sym_get_cam_status(cmd
) != DID_TIME_OUT
)
3179 sym_set_cam_status(cmd
, cam_status
);
3186 * chip handler for TASKS recovery
3188 * We cannot safely abort a command, while the SCRIPTS
3189 * processor is running, since we just would be in race
3192 * As long as we have tasks to abort, we keep the SEM
3193 * bit set in the ISTAT. When this bit is set, the
3194 * SCRIPTS processor interrupts (SIR_SCRIPT_STOPPED)
3195 * each time it enters the scheduler.
3197 * If we have to reset a target, clear tasks of a unit,
3198 * or to perform the abort of a disconnected job, we
3199 * restart the SCRIPTS for selecting the target. Once
3200 * selected, the SCRIPTS interrupts (SIR_TARGET_SELECTED).
3201 * If it loses arbitration, the SCRIPTS will interrupt again
3202 * the next time it will enter its scheduler, and so on ...
3204 * On SIR_TARGET_SELECTED, we scan for the more
3205 * appropriate thing to do:
3207 * - If nothing, we just sent a M_ABORT message to the
3208 * target to get rid of the useless SCSI bus ownership.
3209 * According to the specs, no tasks shall be affected.
3210 * - If the target is to be reset, we send it a M_RESET
3212 * - If a logical UNIT is to be cleared , we send the
3213 * IDENTIFY(lun) + M_ABORT.
3214 * - If an untagged task is to be aborted, we send the
3215 * IDENTIFY(lun) + M_ABORT.
3216 * - If a tagged task is to be aborted, we send the
3217 * IDENTIFY(lun) + task attributes + M_ABORT_TAG.
3219 * Once our 'kiss of death' :) message has been accepted
3220 * by the target, the SCRIPTS interrupts again
3221 * (SIR_ABORT_SENT). On this interrupt, we complete
3222 * all the CCBs that should have been aborted by the
3223 * target according to our message.
3225 static void sym_sir_task_recovery(struct sym_hcb
*np
, int num
)
3229 struct sym_tcb
*tp
= NULL
; /* gcc isn't quite smart enough yet */
3230 struct scsi_target
*starget
;
3231 int target
=-1, lun
=-1, task
;
3236 * The SCRIPTS processor stopped before starting
3237 * the next command in order to allow us to perform
3238 * some task recovery.
3240 case SIR_SCRIPT_STOPPED
:
3242 * Do we have any target to reset or unit to clear ?
3244 for (i
= 0 ; i
< SYM_CONF_MAX_TARGET
; i
++) {
3245 tp
= &np
->target
[i
];
3247 (tp
->lun0p
&& tp
->lun0p
->to_clear
)) {
3253 for (k
= 1 ; k
< SYM_CONF_MAX_LUN
; k
++) {
3254 if (tp
->lunmp
[k
] && tp
->lunmp
[k
]->to_clear
) {
3264 * If not, walk the busy queue for any
3265 * disconnected CCB to be aborted.
3268 FOR_EACH_QUEUED_ELEMENT(&np
->busy_ccbq
, qp
) {
3269 cp
= sym_que_entry(qp
,struct sym_ccb
,link_ccbq
);
3270 if (cp
->host_status
!= HS_DISCONNECT
)
3273 target
= cp
->target
;
3280 * If some target is to be selected,
3281 * prepare and start the selection.
3284 tp
= &np
->target
[target
];
3285 np
->abrt_sel
.sel_id
= target
;
3286 np
->abrt_sel
.sel_scntl3
= tp
->head
.wval
;
3287 np
->abrt_sel
.sel_sxfer
= tp
->head
.sval
;
3288 OUTL(np
, nc_dsa
, np
->hcb_ba
);
3289 OUTL_DSP(np
, SCRIPTB_BA(np
, sel_for_abort
));
3294 * Now look for a CCB to abort that haven't started yet.
3295 * Btw, the SCRIPTS processor is still stopped, so
3296 * we are not in race.
3300 FOR_EACH_QUEUED_ELEMENT(&np
->busy_ccbq
, qp
) {
3301 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
3302 if (cp
->host_status
!= HS_BUSY
&&
3303 cp
->host_status
!= HS_NEGOTIATE
)
3307 #ifdef SYM_CONF_IARB_SUPPORT
3309 * If we are using IMMEDIATE ARBITRATION, we donnot
3310 * want to cancel the last queued CCB, since the
3311 * SCRIPTS may have anticipated the selection.
3313 if (cp
== np
->last_cp
) {
3318 i
= 1; /* Means we have found some */
3323 * We are done, so we donnot need
3324 * to synchronize with the SCRIPTS anylonger.
3325 * Remove the SEM flag from the ISTAT.
3328 OUTB(np
, nc_istat
, SIGP
);
3332 * Compute index of next position in the start
3333 * queue the SCRIPTS intends to start and dequeue
3334 * all CCBs for that device that haven't been started.
3336 i
= (INL(np
, nc_scratcha
) - np
->squeue_ba
) / 4;
3337 i
= sym_dequeue_from_squeue(np
, i
, cp
->target
, cp
->lun
, -1);
3340 * Make sure at least our IO to abort has been dequeued.
3342 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
3343 assert(i
&& sym_get_cam_status(cp
->cmd
) == DID_SOFT_ERROR
);
3345 sym_remque(&cp
->link_ccbq
);
3346 sym_insque_tail(&cp
->link_ccbq
, &np
->comp_ccbq
);
3349 * Keep track in cam status of the reason of the abort.
3351 if (cp
->to_abort
== 2)
3352 sym_set_cam_status(cp
->cmd
, DID_TIME_OUT
);
3354 sym_set_cam_status(cp
->cmd
, DID_ABORT
);
3357 * Complete with error everything that we have dequeued.
3359 sym_flush_comp_queue(np
, 0);
3362 * The SCRIPTS processor has selected a target
3363 * we may have some manual recovery to perform for.
3365 case SIR_TARGET_SELECTED
:
3366 target
= INB(np
, nc_sdid
) & 0xf;
3367 tp
= &np
->target
[target
];
3369 np
->abrt_tbl
.addr
= cpu_to_scr(vtobus(np
->abrt_msg
));
3372 * If the target is to be reset, prepare a
3373 * M_RESET message and clear the to_reset flag
3374 * since we donnot expect this operation to fail.
3377 np
->abrt_msg
[0] = M_RESET
;
3378 np
->abrt_tbl
.size
= 1;
3384 * Otherwise, look for some logical unit to be cleared.
3386 if (tp
->lun0p
&& tp
->lun0p
->to_clear
)
3388 else if (tp
->lunmp
) {
3389 for (k
= 1 ; k
< SYM_CONF_MAX_LUN
; k
++) {
3390 if (tp
->lunmp
[k
] && tp
->lunmp
[k
]->to_clear
) {
3398 * If a logical unit is to be cleared, prepare
3399 * an IDENTIFY(lun) + ABORT MESSAGE.
3402 struct sym_lcb
*lp
= sym_lp(tp
, lun
);
3403 lp
->to_clear
= 0; /* We don't expect to fail here */
3404 np
->abrt_msg
[0] = IDENTIFY(0, lun
);
3405 np
->abrt_msg
[1] = M_ABORT
;
3406 np
->abrt_tbl
.size
= 2;
3411 * Otherwise, look for some disconnected job to
3412 * abort for this target.
3416 FOR_EACH_QUEUED_ELEMENT(&np
->busy_ccbq
, qp
) {
3417 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
3418 if (cp
->host_status
!= HS_DISCONNECT
)
3420 if (cp
->target
!= target
)
3424 i
= 1; /* Means we have some */
3429 * If we have none, probably since the device has
3430 * completed the command before we won abitration,
3431 * send a M_ABORT message without IDENTIFY.
3432 * According to the specs, the device must just
3433 * disconnect the BUS and not abort any task.
3436 np
->abrt_msg
[0] = M_ABORT
;
3437 np
->abrt_tbl
.size
= 1;
3442 * We have some task to abort.
3443 * Set the IDENTIFY(lun)
3445 np
->abrt_msg
[0] = IDENTIFY(0, cp
->lun
);
3448 * If we want to abort an untagged command, we
3449 * will send a IDENTIFY + M_ABORT.
3450 * Otherwise (tagged command), we will send
3451 * a IDENTITFY + task attributes + ABORT TAG.
3453 if (cp
->tag
== NO_TAG
) {
3454 np
->abrt_msg
[1] = M_ABORT
;
3455 np
->abrt_tbl
.size
= 2;
3457 np
->abrt_msg
[1] = cp
->scsi_smsg
[1];
3458 np
->abrt_msg
[2] = cp
->scsi_smsg
[2];
3459 np
->abrt_msg
[3] = M_ABORT_TAG
;
3460 np
->abrt_tbl
.size
= 4;
3463 * Keep track of software timeout condition, since the
3464 * peripheral driver may not count retries on abort
3465 * conditions not due to timeout.
3467 if (cp
->to_abort
== 2)
3468 sym_set_cam_status(cp
->cmd
, DID_TIME_OUT
);
3469 cp
->to_abort
= 0; /* We donnot expect to fail here */
3473 * The target has accepted our message and switched
3474 * to BUS FREE phase as we expected.
3476 case SIR_ABORT_SENT
:
3477 target
= INB(np
, nc_sdid
) & 0xf;
3478 tp
= &np
->target
[target
];
3479 starget
= tp
->starget
;
3482 ** If we didn't abort anything, leave here.
3484 if (np
->abrt_msg
[0] == M_ABORT
)
3488 * If we sent a M_RESET, then a hardware reset has
3489 * been performed by the target.
3490 * - Reset everything to async 8 bit
3491 * - Tell ourself to negotiate next time :-)
3492 * - Prepare to clear all disconnected CCBs for
3493 * this target from our task list (lun=task=-1)
3497 if (np
->abrt_msg
[0] == M_RESET
) {
3499 tp
->head
.wval
= np
->rv_scntl3
;
3501 spi_period(starget
) = 0;
3502 spi_offset(starget
) = 0;
3503 spi_width(starget
) = 0;
3504 spi_iu(starget
) = 0;
3505 spi_dt(starget
) = 0;
3506 spi_qas(starget
) = 0;
3507 tp
->tgoal
.check_nego
= 1;
3508 tp
->tgoal
.renego
= 0;
3512 * Otherwise, check for the LUN and TASK(s)
3513 * concerned by the cancelation.
3514 * If it is not ABORT_TAG then it is CLEAR_QUEUE
3515 * or an ABORT message :-)
3518 lun
= np
->abrt_msg
[0] & 0x3f;
3519 if (np
->abrt_msg
[1] == M_ABORT_TAG
)
3520 task
= np
->abrt_msg
[2];
3524 * Complete all the CCBs the device should have
3525 * aborted due to our 'kiss of death' message.
3527 i
= (INL(np
, nc_scratcha
) - np
->squeue_ba
) / 4;
3528 sym_dequeue_from_squeue(np
, i
, target
, lun
, -1);
3529 sym_clear_tasks(np
, DID_ABORT
, target
, lun
, task
);
3530 sym_flush_comp_queue(np
, 0);
3533 * If we sent a BDR, make upper layer aware of that.
3535 if (np
->abrt_msg
[0] == M_RESET
)
3536 starget_printk(KERN_NOTICE
, starget
,
3537 "has been reset\n");
3542 * Print to the log the message we intend to send.
3544 if (num
== SIR_TARGET_SELECTED
) {
3545 dev_info(&tp
->starget
->dev
, "control msgout:");
3546 sym_printl_hex(np
->abrt_msg
, np
->abrt_tbl
.size
);
3547 np
->abrt_tbl
.size
= cpu_to_scr(np
->abrt_tbl
.size
);
3551 * Let the SCRIPTS processor continue.
3557 * Gerard's alchemy:) that deals with with the data
3558 * pointer for both MDP and the residual calculation.
3560 * I didn't want to bloat the code by more than 200
3561 * lines for the handling of both MDP and the residual.
3562 * This has been achieved by using a data pointer
3563 * representation consisting in an index in the data
3564 * array (dp_sg) and a negative offset (dp_ofs) that
3565 * have the following meaning:
3567 * - dp_sg = SYM_CONF_MAX_SG
3568 * we are at the end of the data script.
3569 * - dp_sg < SYM_CONF_MAX_SG
3570 * dp_sg points to the next entry of the scatter array
3571 * we want to transfer.
3573 * dp_ofs represents the residual of bytes of the
3574 * previous entry scatter entry we will send first.
3576 * no residual to send first.
3578 * The function sym_evaluate_dp() accepts an arbitray
3579 * offset (basically from the MDP message) and returns
3580 * the corresponding values of dp_sg and dp_ofs.
3583 static int sym_evaluate_dp(struct sym_hcb
*np
, struct sym_ccb
*cp
, u32 scr
, int *ofs
)
3586 int dp_ofs
, dp_sg
, dp_sgmin
;
3591 * Compute the resulted data pointer in term of a script
3592 * address within some DATA script and a signed byte offset.
3596 if (dp_scr
== SCRIPTA_BA(np
, pm0_data
))
3598 else if (dp_scr
== SCRIPTA_BA(np
, pm1_data
))
3604 dp_scr
= scr_to_cpu(pm
->ret
);
3605 dp_ofs
-= scr_to_cpu(pm
->sg
.size
) & 0x00ffffff;
3609 * If we are auto-sensing, then we are done.
3611 if (cp
->host_flags
& HF_SENSE
) {
3617 * Deduce the index of the sg entry.
3618 * Keep track of the index of the first valid entry.
3619 * If result is dp_sg = SYM_CONF_MAX_SG, then we are at the
3622 tmp
= scr_to_cpu(cp
->goalp
);
3623 dp_sg
= SYM_CONF_MAX_SG
;
3625 dp_sg
-= (tmp
- 8 - (int)dp_scr
) / (2*4);
3626 dp_sgmin
= SYM_CONF_MAX_SG
- cp
->segments
;
3629 * Move to the sg entry the data pointer belongs to.
3631 * If we are inside the data area, we expect result to be:
3634 * dp_ofs = 0 and dp_sg is the index of the sg entry
3635 * the data pointer belongs to (or the end of the data)
3637 * dp_ofs < 0 and dp_sg is the index of the sg entry
3638 * the data pointer belongs to + 1.
3642 while (dp_sg
> dp_sgmin
) {
3644 tmp
= scr_to_cpu(cp
->phys
.data
[dp_sg
].size
);
3645 n
= dp_ofs
+ (tmp
& 0xffffff);
3653 else if (dp_ofs
> 0) {
3654 while (dp_sg
< SYM_CONF_MAX_SG
) {
3655 tmp
= scr_to_cpu(cp
->phys
.data
[dp_sg
].size
);
3656 dp_ofs
-= (tmp
& 0xffffff);
3664 * Make sure the data pointer is inside the data area.
3665 * If not, return some error.
3667 if (dp_sg
< dp_sgmin
|| (dp_sg
== dp_sgmin
&& dp_ofs
< 0))
3669 else if (dp_sg
> SYM_CONF_MAX_SG
||
3670 (dp_sg
== SYM_CONF_MAX_SG
&& dp_ofs
> 0))
3674 * Save the extreme pointer if needed.
3676 if (dp_sg
> cp
->ext_sg
||
3677 (dp_sg
== cp
->ext_sg
&& dp_ofs
> cp
->ext_ofs
)) {
3679 cp
->ext_ofs
= dp_ofs
;
3693 * chip handler for MODIFY DATA POINTER MESSAGE
3695 * We also call this function on IGNORE WIDE RESIDUE
3696 * messages that do not match a SWIDE full condition.
3697 * Btw, we assume in that situation that such a message
3698 * is equivalent to a MODIFY DATA POINTER (offset=-1).
3701 static void sym_modify_dp(struct sym_hcb
*np
, struct sym_tcb
*tp
, struct sym_ccb
*cp
, int ofs
)
3704 u32 dp_scr
= sym_get_script_dp (np
, cp
);
3712 * Not supported for auto-sense.
3714 if (cp
->host_flags
& HF_SENSE
)
3718 * Apply our alchemy:) (see comments in sym_evaluate_dp()),
3719 * to the resulted data pointer.
3721 dp_sg
= sym_evaluate_dp(np
, cp
, dp_scr
, &dp_ofs
);
3726 * And our alchemy:) allows to easily calculate the data
3727 * script address we want to return for the next data phase.
3729 dp_ret
= cpu_to_scr(cp
->goalp
);
3730 dp_ret
= dp_ret
- 8 - (SYM_CONF_MAX_SG
- dp_sg
) * (2*4);
3733 * If offset / scatter entry is zero we donnot need
3734 * a context for the new current data pointer.
3742 * Get a context for the new current data pointer.
3744 hflags
= INB(np
, HF_PRT
);
3746 if (hflags
& HF_DP_SAVED
)
3747 hflags
^= HF_ACT_PM
;
3749 if (!(hflags
& HF_ACT_PM
)) {
3751 dp_scr
= SCRIPTA_BA(np
, pm0_data
);
3755 dp_scr
= SCRIPTA_BA(np
, pm1_data
);
3758 hflags
&= ~(HF_DP_SAVED
);
3760 OUTB(np
, HF_PRT
, hflags
);
3763 * Set up the new current data pointer.
3764 * ofs < 0 there, and for the next data phase, we
3765 * want to transfer part of the data of the sg entry
3766 * corresponding to index dp_sg-1 prior to returning
3767 * to the main data script.
3769 pm
->ret
= cpu_to_scr(dp_ret
);
3770 tmp
= scr_to_cpu(cp
->phys
.data
[dp_sg
-1].addr
);
3771 tmp
+= scr_to_cpu(cp
->phys
.data
[dp_sg
-1].size
) + dp_ofs
;
3772 pm
->sg
.addr
= cpu_to_scr(tmp
);
3773 pm
->sg
.size
= cpu_to_scr(-dp_ofs
);
3776 sym_set_script_dp (np
, cp
, dp_scr
);
3777 OUTL_DSP(np
, SCRIPTA_BA(np
, clrack
));
3781 OUTL_DSP(np
, SCRIPTB_BA(np
, msg_bad
));
3786 * chip calculation of the data residual.
3788 * As I used to say, the requirement of data residual
3789 * in SCSI is broken, useless and cannot be achieved
3790 * without huge complexity.
3791 * But most OSes and even the official CAM require it.
3792 * When stupidity happens to be so widely spread inside
3793 * a community, it gets hard to convince.
3795 * Anyway, I don't care, since I am not going to use
3796 * any software that considers this data residual as
3797 * a relevant information. :)
3800 int sym_compute_residual(struct sym_hcb
*np
, struct sym_ccb
*cp
)
3802 int dp_sg
, dp_sgmin
, resid
= 0;
3806 * Check for some data lost or just thrown away.
3807 * We are not required to be quite accurate in this
3808 * situation. Btw, if we are odd for output and the
3809 * device claims some more data, it may well happen
3810 * than our residual be zero. :-)
3812 if (cp
->xerr_status
& (XE_EXTRA_DATA
|XE_SODL_UNRUN
|XE_SWIDE_OVRUN
)) {
3813 if (cp
->xerr_status
& XE_EXTRA_DATA
)
3814 resid
-= cp
->extra_bytes
;
3815 if (cp
->xerr_status
& XE_SODL_UNRUN
)
3817 if (cp
->xerr_status
& XE_SWIDE_OVRUN
)
3822 * If all data has been transferred,
3823 * there is no residual.
3825 if (cp
->phys
.head
.lastp
== cp
->goalp
)
3829 * If no data transfer occurs, or if the data
3830 * pointer is weird, return full residual.
3832 if (cp
->startp
== cp
->phys
.head
.lastp
||
3833 sym_evaluate_dp(np
, cp
, scr_to_cpu(cp
->phys
.head
.lastp
),
3835 return cp
->data_len
- cp
->odd_byte_adjustment
;
3839 * If we were auto-sensing, then we are done.
3841 if (cp
->host_flags
& HF_SENSE
) {
3846 * We are now full comfortable in the computation
3847 * of the data residual (2's complement).
3849 dp_sgmin
= SYM_CONF_MAX_SG
- cp
->segments
;
3850 resid
= -cp
->ext_ofs
;
3851 for (dp_sg
= cp
->ext_sg
; dp_sg
< SYM_CONF_MAX_SG
; ++dp_sg
) {
3852 u_int tmp
= scr_to_cpu(cp
->phys
.data
[dp_sg
].size
);
3853 resid
+= (tmp
& 0xffffff);
3856 resid
-= cp
->odd_byte_adjustment
;
3859 * Hopefully, the result is not too wrong.
3865 * Negotiation for WIDE and SYNCHRONOUS DATA TRANSFER.
3867 * When we try to negotiate, we append the negotiation message
3868 * to the identify and (maybe) simple tag message.
3869 * The host status field is set to HS_NEGOTIATE to mark this
3872 * If the target doesn't answer this message immediately
3873 * (as required by the standard), the SIR_NEGO_FAILED interrupt
3874 * will be raised eventually.
3875 * The handler removes the HS_NEGOTIATE status, and sets the
3876 * negotiated value to the default (async / nowide).
3878 * If we receive a matching answer immediately, we check it
3879 * for validity, and set the values.
3881 * If we receive a Reject message immediately, we assume the
3882 * negotiation has failed, and fall back to standard values.
3884 * If we receive a negotiation message while not in HS_NEGOTIATE
3885 * state, it's a target initiated negotiation. We prepare a
3886 * (hopefully) valid answer, set our parameters, and send back
3887 * this answer to the target.
3889 * If the target doesn't fetch the answer (no message out phase),
3890 * we assume the negotiation has failed, and fall back to default
3891 * settings (SIR_NEGO_PROTO interrupt).
3893 * When we set the values, we adjust them in all ccbs belonging
3894 * to this target, in the controller's register, and in the "phys"
3895 * field of the controller's struct sym_hcb.
3899 * chip handler for SYNCHRONOUS DATA TRANSFER REQUEST (SDTR) message.
3902 sym_sync_nego_check(struct sym_hcb
*np
, int req
, struct sym_ccb
*cp
)
3904 int target
= cp
->target
;
3905 u_char chg
, ofs
, per
, fak
, div
;
3907 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
3908 sym_print_nego_msg(np
, target
, "sync msgin", np
->msgin
);
3912 * Get requested values.
3919 * Check values against our limits.
3922 if (ofs
> np
->maxoffs
)
3923 {chg
= 1; ofs
= np
->maxoffs
;}
3927 if (per
< np
->minsync
)
3928 {chg
= 1; per
= np
->minsync
;}
3932 * Get new chip synchronous parameters value.
3935 if (ofs
&& sym_getsync(np
, 0, per
, &div
, &fak
) < 0)
3938 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
3939 sym_print_addr(cp
->cmd
,
3940 "sdtr: ofs=%d per=%d div=%d fak=%d chg=%d.\n",
3941 ofs
, per
, div
, fak
, chg
);
3945 * If it was an answer we want to change,
3946 * then it isn't acceptable. Reject it.
3954 sym_setsync (np
, target
, ofs
, per
, div
, fak
);
3957 * It was an answer. We are done.
3963 * It was a request. Prepare an answer message.
3965 spi_populate_sync_msg(np
->msgout
, per
, ofs
);
3967 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
3968 sym_print_nego_msg(np
, target
, "sync msgout", np
->msgout
);
3971 np
->msgin
[0] = M_NOOP
;
3976 sym_setsync (np
, target
, 0, 0, 0, 0);
3980 static void sym_sync_nego(struct sym_hcb
*np
, struct sym_tcb
*tp
, struct sym_ccb
*cp
)
3986 * Request or answer ?
3988 if (INB(np
, HS_PRT
) == HS_NEGOTIATE
) {
3989 OUTB(np
, HS_PRT
, HS_BUSY
);
3990 if (cp
->nego_status
&& cp
->nego_status
!= NS_SYNC
)
3996 * Check and apply new values.
3998 result
= sym_sync_nego_check(np
, req
, cp
);
3999 if (result
) /* Not acceptable, reject it */
4001 if (req
) { /* Was a request, send response. */
4002 cp
->nego_status
= NS_SYNC
;
4003 OUTL_DSP(np
, SCRIPTB_BA(np
, sdtr_resp
));
4005 else /* Was a response, we are done. */
4006 OUTL_DSP(np
, SCRIPTA_BA(np
, clrack
));
4010 OUTL_DSP(np
, SCRIPTB_BA(np
, msg_bad
));
4014 * chip handler for PARALLEL PROTOCOL REQUEST (PPR) message.
4017 sym_ppr_nego_check(struct sym_hcb
*np
, int req
, int target
)
4019 struct sym_tcb
*tp
= &np
->target
[target
];
4020 unsigned char fak
, div
;
4023 unsigned char per
= np
->msgin
[3];
4024 unsigned char ofs
= np
->msgin
[5];
4025 unsigned char wide
= np
->msgin
[6];
4026 unsigned char opts
= np
->msgin
[7] & PPR_OPT_MASK
;
4028 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4029 sym_print_nego_msg(np
, target
, "ppr msgin", np
->msgin
);
4033 * Check values against our limits.
4035 if (wide
> np
->maxwide
) {
4039 if (!wide
|| !(np
->features
& FE_U3EN
))
4042 if (opts
!= (np
->msgin
[7] & PPR_OPT_MASK
))
4045 dt
= opts
& PPR_OPT_DT
;
4048 unsigned char maxoffs
= dt
? np
->maxoffs_dt
: np
->maxoffs
;
4049 if (ofs
> maxoffs
) {
4056 unsigned char minsync
= dt
? np
->minsync_dt
: np
->minsync
;
4057 if (per
< minsync
) {
4064 * Get new chip synchronous parameters value.
4067 if (ofs
&& sym_getsync(np
, dt
, per
, &div
, &fak
) < 0)
4071 * If it was an answer we want to change,
4072 * then it isn't acceptable. Reject it.
4080 sym_setpprot(np
, target
, opts
, ofs
, per
, wide
, div
, fak
);
4083 * It was an answer. We are done.
4089 * It was a request. Prepare an answer message.
4091 spi_populate_ppr_msg(np
->msgout
, per
, ofs
, wide
, opts
);
4093 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4094 sym_print_nego_msg(np
, target
, "ppr msgout", np
->msgout
);
4097 np
->msgin
[0] = M_NOOP
;
4102 sym_setpprot (np
, target
, 0, 0, 0, 0, 0, 0);
4104 * If it is a device response that should result in
4105 * ST, we may want to try a legacy negotiation later.
4107 if (!req
&& !opts
) {
4108 tp
->tgoal
.period
= per
;
4109 tp
->tgoal
.offset
= ofs
;
4110 tp
->tgoal
.width
= wide
;
4111 tp
->tgoal
.iu
= tp
->tgoal
.dt
= tp
->tgoal
.qas
= 0;
4112 tp
->tgoal
.check_nego
= 1;
4117 static void sym_ppr_nego(struct sym_hcb
*np
, struct sym_tcb
*tp
, struct sym_ccb
*cp
)
4123 * Request or answer ?
4125 if (INB(np
, HS_PRT
) == HS_NEGOTIATE
) {
4126 OUTB(np
, HS_PRT
, HS_BUSY
);
4127 if (cp
->nego_status
&& cp
->nego_status
!= NS_PPR
)
4133 * Check and apply new values.
4135 result
= sym_ppr_nego_check(np
, req
, cp
->target
);
4136 if (result
) /* Not acceptable, reject it */
4138 if (req
) { /* Was a request, send response. */
4139 cp
->nego_status
= NS_PPR
;
4140 OUTL_DSP(np
, SCRIPTB_BA(np
, ppr_resp
));
4142 else /* Was a response, we are done. */
4143 OUTL_DSP(np
, SCRIPTA_BA(np
, clrack
));
4147 OUTL_DSP(np
, SCRIPTB_BA(np
, msg_bad
));
4151 * chip handler for WIDE DATA TRANSFER REQUEST (WDTR) message.
4154 sym_wide_nego_check(struct sym_hcb
*np
, int req
, struct sym_ccb
*cp
)
4156 int target
= cp
->target
;
4159 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4160 sym_print_nego_msg(np
, target
, "wide msgin", np
->msgin
);
4164 * Get requested values.
4167 wide
= np
->msgin
[3];
4170 * Check values against our limits.
4172 if (wide
> np
->maxwide
) {
4177 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4178 sym_print_addr(cp
->cmd
, "wdtr: wide=%d chg=%d.\n",
4183 * If it was an answer we want to change,
4184 * then it isn't acceptable. Reject it.
4192 sym_setwide (np
, target
, wide
);
4195 * It was an answer. We are done.
4201 * It was a request. Prepare an answer message.
4203 spi_populate_width_msg(np
->msgout
, wide
);
4205 np
->msgin
[0] = M_NOOP
;
4207 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4208 sym_print_nego_msg(np
, target
, "wide msgout", np
->msgout
);
4217 static void sym_wide_nego(struct sym_hcb
*np
, struct sym_tcb
*tp
, struct sym_ccb
*cp
)
4223 * Request or answer ?
4225 if (INB(np
, HS_PRT
) == HS_NEGOTIATE
) {
4226 OUTB(np
, HS_PRT
, HS_BUSY
);
4227 if (cp
->nego_status
&& cp
->nego_status
!= NS_WIDE
)
4233 * Check and apply new values.
4235 result
= sym_wide_nego_check(np
, req
, cp
);
4236 if (result
) /* Not acceptable, reject it */
4238 if (req
) { /* Was a request, send response. */
4239 cp
->nego_status
= NS_WIDE
;
4240 OUTL_DSP(np
, SCRIPTB_BA(np
, wdtr_resp
));
4241 } else { /* Was a response. */
4243 * Negotiate for SYNC immediately after WIDE response.
4244 * This allows to negotiate for both WIDE and SYNC on
4245 * a single SCSI command (Suggested by Justin Gibbs).
4247 if (tp
->tgoal
.offset
) {
4248 spi_populate_sync_msg(np
->msgout
, tp
->tgoal
.period
,
4251 if (DEBUG_FLAGS
& DEBUG_NEGO
) {
4252 sym_print_nego_msg(np
, cp
->target
,
4253 "sync msgout", np
->msgout
);
4256 cp
->nego_status
= NS_SYNC
;
4257 OUTB(np
, HS_PRT
, HS_NEGOTIATE
);
4258 OUTL_DSP(np
, SCRIPTB_BA(np
, sdtr_resp
));
4261 OUTL_DSP(np
, SCRIPTA_BA(np
, clrack
));
4267 OUTL_DSP(np
, SCRIPTB_BA(np
, msg_bad
));
4271 * Reset DT, SYNC or WIDE to default settings.
4273 * Called when a negotiation does not succeed either
4274 * on rejection or on protocol error.
4276 * A target that understands a PPR message should never
4277 * reject it, and messing with it is very unlikely.
4278 * So, if a PPR makes problems, we may just want to
4279 * try a legacy negotiation later.
4281 static void sym_nego_default(struct sym_hcb
*np
, struct sym_tcb
*tp
, struct sym_ccb
*cp
)
4283 switch (cp
->nego_status
) {
4285 if (tp
->tgoal
.period
< np
->minsync
)
4286 tp
->tgoal
.period
= np
->minsync
;
4287 if (tp
->tgoal
.offset
> np
->maxoffs
)
4288 tp
->tgoal
.offset
= np
->maxoffs
;
4289 tp
->tgoal
.iu
= tp
->tgoal
.dt
= tp
->tgoal
.qas
= 0;
4290 tp
->tgoal
.check_nego
= 1;
4293 sym_setsync (np
, cp
->target
, 0, 0, 0, 0);
4296 sym_setwide (np
, cp
->target
, 0);
4299 np
->msgin
[0] = M_NOOP
;
4300 np
->msgout
[0] = M_NOOP
;
4301 cp
->nego_status
= 0;
4305 * chip handler for MESSAGE REJECT received in response to
4306 * PPR, WIDE or SYNCHRONOUS negotiation.
4308 static void sym_nego_rejected(struct sym_hcb
*np
, struct sym_tcb
*tp
, struct sym_ccb
*cp
)
4310 sym_nego_default(np
, tp
, cp
);
4311 OUTB(np
, HS_PRT
, HS_BUSY
);
4315 * chip exception handler for programmed interrupts.
4317 static void sym_int_sir(struct sym_hcb
*np
)
4319 u_char num
= INB(np
, nc_dsps
);
4320 u32 dsa
= INL(np
, nc_dsa
);
4321 struct sym_ccb
*cp
= sym_ccb_from_dsa(np
, dsa
);
4322 u_char target
= INB(np
, nc_sdid
) & 0x0f;
4323 struct sym_tcb
*tp
= &np
->target
[target
];
4326 if (DEBUG_FLAGS
& DEBUG_TINY
) printf ("I#%d", num
);
4329 #if SYM_CONF_DMA_ADDRESSING_MODE == 2
4331 * SCRIPTS tell us that we may have to update
4332 * 64 bit DMA segment registers.
4334 case SIR_DMAP_DIRTY
:
4335 sym_update_dmap_regs(np
);
4339 * Command has been completed with error condition
4340 * or has been auto-sensed.
4342 case SIR_COMPLETE_ERROR
:
4343 sym_complete_error(np
, cp
);
4346 * The C code is currently trying to recover from something.
4347 * Typically, user want to abort some command.
4349 case SIR_SCRIPT_STOPPED
:
4350 case SIR_TARGET_SELECTED
:
4351 case SIR_ABORT_SENT
:
4352 sym_sir_task_recovery(np
, num
);
4355 * The device didn't go to MSG OUT phase after having
4356 * been selected with ATN. We do not want to handle that.
4358 case SIR_SEL_ATN_NO_MSG_OUT
:
4359 scmd_printk(KERN_WARNING
, cp
->cmd
,
4360 "No MSG OUT phase after selection with ATN\n");
4363 * The device didn't switch to MSG IN phase after
4364 * having reselected the initiator.
4366 case SIR_RESEL_NO_MSG_IN
:
4367 scmd_printk(KERN_WARNING
, cp
->cmd
,
4368 "No MSG IN phase after reselection\n");
4371 * After reselection, the device sent a message that wasn't
4374 case SIR_RESEL_NO_IDENTIFY
:
4375 scmd_printk(KERN_WARNING
, cp
->cmd
,
4376 "No IDENTIFY after reselection\n");
4379 * The device reselected a LUN we do not know about.
4381 case SIR_RESEL_BAD_LUN
:
4382 np
->msgout
[0] = M_RESET
;
4385 * The device reselected for an untagged nexus and we
4388 case SIR_RESEL_BAD_I_T_L
:
4389 np
->msgout
[0] = M_ABORT
;
4392 * The device reselected for a tagged nexus that we do not have.
4394 case SIR_RESEL_BAD_I_T_L_Q
:
4395 np
->msgout
[0] = M_ABORT_TAG
;
4398 * The SCRIPTS let us know that the device has grabbed
4399 * our message and will abort the job.
4401 case SIR_RESEL_ABORTED
:
4402 np
->lastmsg
= np
->msgout
[0];
4403 np
->msgout
[0] = M_NOOP
;
4404 scmd_printk(KERN_WARNING
, cp
->cmd
,
4405 "message %x sent on bad reselection\n", np
->lastmsg
);
4408 * The SCRIPTS let us know that a message has been
4409 * successfully sent to the device.
4411 case SIR_MSG_OUT_DONE
:
4412 np
->lastmsg
= np
->msgout
[0];
4413 np
->msgout
[0] = M_NOOP
;
4414 /* Should we really care of that */
4415 if (np
->lastmsg
== M_PARITY
|| np
->lastmsg
== M_ID_ERROR
) {
4417 cp
->xerr_status
&= ~XE_PARITY_ERR
;
4418 if (!cp
->xerr_status
)
4419 OUTOFFB(np
, HF_PRT
, HF_EXT_ERR
);
4424 * The device didn't send a GOOD SCSI status.
4425 * We may have some work to do prior to allow
4426 * the SCRIPTS processor to continue.
4428 case SIR_BAD_SCSI_STATUS
:
4431 sym_sir_bad_scsi_status(np
, num
, cp
);
4434 * We are asked by the SCRIPTS to prepare a
4437 case SIR_REJECT_TO_SEND
:
4438 sym_print_msg(cp
, "M_REJECT to send for ", np
->msgin
);
4439 np
->msgout
[0] = M_REJECT
;
4442 * We have been ODD at the end of a DATA IN
4443 * transfer and the device didn't send a
4444 * IGNORE WIDE RESIDUE message.
4445 * It is a data overrun condition.
4447 case SIR_SWIDE_OVERRUN
:
4449 OUTONB(np
, HF_PRT
, HF_EXT_ERR
);
4450 cp
->xerr_status
|= XE_SWIDE_OVRUN
;
4454 * We have been ODD at the end of a DATA OUT
4456 * It is a data underrun condition.
4458 case SIR_SODL_UNDERRUN
:
4460 OUTONB(np
, HF_PRT
, HF_EXT_ERR
);
4461 cp
->xerr_status
|= XE_SODL_UNRUN
;
4465 * The device wants us to tranfer more data than
4466 * expected or in the wrong direction.
4467 * The number of extra bytes is in scratcha.
4468 * It is a data overrun condition.
4470 case SIR_DATA_OVERRUN
:
4472 OUTONB(np
, HF_PRT
, HF_EXT_ERR
);
4473 cp
->xerr_status
|= XE_EXTRA_DATA
;
4474 cp
->extra_bytes
+= INL(np
, nc_scratcha
);
4478 * The device switched to an illegal phase (4/5).
4482 OUTONB(np
, HF_PRT
, HF_EXT_ERR
);
4483 cp
->xerr_status
|= XE_BAD_PHASE
;
4487 * We received a message.
4489 case SIR_MSG_RECEIVED
:
4492 switch (np
->msgin
[0]) {
4494 * We received an extended message.
4495 * We handle MODIFY DATA POINTER, SDTR, WDTR
4496 * and reject all other extended messages.
4499 switch (np
->msgin
[2]) {
4501 if (DEBUG_FLAGS
& DEBUG_POINTER
)
4502 sym_print_msg(cp
, "extended msg ",
4504 tmp
= (np
->msgin
[3]<<24) + (np
->msgin
[4]<<16) +
4505 (np
->msgin
[5]<<8) + (np
->msgin
[6]);
4506 sym_modify_dp(np
, tp
, cp
, tmp
);
4509 sym_sync_nego(np
, tp
, cp
);
4512 sym_ppr_nego(np
, tp
, cp
);
4515 sym_wide_nego(np
, tp
, cp
);
4522 * We received a 1/2 byte message not handled from SCRIPTS.
4523 * We are only expecting MESSAGE REJECT and IGNORE WIDE
4524 * RESIDUE messages that haven't been anticipated by
4525 * SCRIPTS on SWIDE full condition. Unanticipated IGNORE
4526 * WIDE RESIDUE messages are aliased as MODIFY DP (-1).
4529 if (DEBUG_FLAGS
& DEBUG_POINTER
)
4530 sym_print_msg(cp
, "1 or 2 byte ", np
->msgin
);
4531 if (cp
->host_flags
& HF_SENSE
)
4532 OUTL_DSP(np
, SCRIPTA_BA(np
, clrack
));
4534 sym_modify_dp(np
, tp
, cp
, -1);
4537 if (INB(np
, HS_PRT
) == HS_NEGOTIATE
)
4538 sym_nego_rejected(np
, tp
, cp
);
4540 sym_print_addr(cp
->cmd
,
4541 "M_REJECT received (%x:%x).\n",
4542 scr_to_cpu(np
->lastmsg
), np
->msgout
[0]);
4551 * We received an unknown message.
4552 * Ignore all MSG IN phases and reject it.
4555 sym_print_msg(cp
, "WEIRD message received", np
->msgin
);
4556 OUTL_DSP(np
, SCRIPTB_BA(np
, msg_weird
));
4559 * Negotiation failed.
4560 * Target does not send us the reply.
4561 * Remove the HS_NEGOTIATE status.
4563 case SIR_NEGO_FAILED
:
4564 OUTB(np
, HS_PRT
, HS_BUSY
);
4566 * Negotiation failed.
4567 * Target does not want answer message.
4569 case SIR_NEGO_PROTO
:
4570 sym_nego_default(np
, tp
, cp
);
4578 OUTL_DSP(np
, SCRIPTB_BA(np
, msg_bad
));
4581 OUTL_DSP(np
, SCRIPTA_BA(np
, clrack
));
4588 * Acquire a control block
4590 struct sym_ccb
*sym_get_ccb (struct sym_hcb
*np
, struct scsi_cmnd
*cmd
, u_char tag_order
)
4592 u_char tn
= cmd
->device
->id
;
4593 u_char ln
= cmd
->device
->lun
;
4594 struct sym_tcb
*tp
= &np
->target
[tn
];
4595 struct sym_lcb
*lp
= sym_lp(tp
, ln
);
4596 u_short tag
= NO_TAG
;
4598 struct sym_ccb
*cp
= NULL
;
4601 * Look for a free CCB
4603 if (sym_que_empty(&np
->free_ccbq
))
4605 qp
= sym_remque_head(&np
->free_ccbq
);
4608 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
4612 * If we have been asked for a tagged command.
4616 * Debugging purpose.
4618 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4619 if (lp
->busy_itl
!= 0)
4623 * Allocate resources for tags if not yet.
4626 sym_alloc_lcb_tags(np
, tn
, ln
);
4631 * Get a tag for this SCSI IO and set up
4632 * the CCB bus address for reselection,
4633 * and count it for this LUN.
4634 * Toggle reselect path to tagged.
4636 if (lp
->busy_itlq
< SYM_CONF_MAX_TASK
) {
4637 tag
= lp
->cb_tags
[lp
->ia_tag
];
4638 if (++lp
->ia_tag
== SYM_CONF_MAX_TASK
)
4641 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4642 lp
->itlq_tbl
[tag
] = cpu_to_scr(cp
->ccb_ba
);
4644 cpu_to_scr(SCRIPTA_BA(np
, resel_tag
));
4646 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
4647 cp
->tags_si
= lp
->tags_si
;
4648 ++lp
->tags_sum
[cp
->tags_si
];
4656 * This command will not be tagged.
4657 * If we already have either a tagged or untagged
4658 * one, refuse to overlap this untagged one.
4662 * Debugging purpose.
4664 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4665 if (lp
->busy_itl
!= 0 || lp
->busy_itlq
!= 0)
4669 * Count this nexus for this LUN.
4670 * Set up the CCB bus address for reselection.
4671 * Toggle reselect path to untagged.
4674 #ifndef SYM_OPT_HANDLE_DEVICE_QUEUEING
4675 if (lp
->busy_itl
== 1) {
4676 lp
->head
.itl_task_sa
= cpu_to_scr(cp
->ccb_ba
);
4678 cpu_to_scr(SCRIPTA_BA(np
, resel_no_tag
));
4686 * Put the CCB into the busy queue.
4688 sym_insque_tail(&cp
->link_ccbq
, &np
->busy_ccbq
);
4689 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4691 sym_remque(&cp
->link2_ccbq
);
4692 sym_insque_tail(&cp
->link2_ccbq
, &lp
->waiting_ccbq
);
4697 cp
->odd_byte_adjustment
= 0;
4699 cp
->order
= tag_order
;
4703 if (DEBUG_FLAGS
& DEBUG_TAGS
) {
4704 sym_print_addr(cmd
, "ccb @%p using tag %d.\n", cp
, tag
);
4710 sym_insque_head(&cp
->link_ccbq
, &np
->free_ccbq
);
4715 * Release one control block
4717 void sym_free_ccb (struct sym_hcb
*np
, struct sym_ccb
*cp
)
4719 struct sym_tcb
*tp
= &np
->target
[cp
->target
];
4720 struct sym_lcb
*lp
= sym_lp(tp
, cp
->lun
);
4722 if (DEBUG_FLAGS
& DEBUG_TAGS
) {
4723 sym_print_addr(cp
->cmd
, "ccb @%p freeing tag %d.\n",
4732 * If tagged, release the tag, set the relect path
4734 if (cp
->tag
!= NO_TAG
) {
4735 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
4736 --lp
->tags_sum
[cp
->tags_si
];
4739 * Free the tag value.
4741 lp
->cb_tags
[lp
->if_tag
] = cp
->tag
;
4742 if (++lp
->if_tag
== SYM_CONF_MAX_TASK
)
4745 * Make the reselect path invalid,
4746 * and uncount this CCB.
4748 lp
->itlq_tbl
[cp
->tag
] = cpu_to_scr(np
->bad_itlq_ba
);
4750 } else { /* Untagged */
4752 * Make the reselect path invalid,
4753 * and uncount this CCB.
4755 lp
->head
.itl_task_sa
= cpu_to_scr(np
->bad_itl_ba
);
4759 * If no JOB active, make the LUN reselect path invalid.
4761 if (lp
->busy_itlq
== 0 && lp
->busy_itl
== 0)
4763 cpu_to_scr(SCRIPTB_BA(np
, resel_bad_lun
));
4767 * We donnot queue more than 1 ccb per target
4768 * with negotiation at any time. If this ccb was
4769 * used for negotiation, clear this info in the tcb.
4771 if (cp
== tp
->nego_cp
)
4774 #ifdef SYM_CONF_IARB_SUPPORT
4776 * If we just complete the last queued CCB,
4777 * clear this info that is no longer relevant.
4779 if (cp
== np
->last_cp
)
4784 * Make this CCB available.
4787 cp
->host_status
= HS_IDLE
;
4788 sym_remque(&cp
->link_ccbq
);
4789 sym_insque_head(&cp
->link_ccbq
, &np
->free_ccbq
);
4791 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4793 sym_remque(&cp
->link2_ccbq
);
4794 sym_insque_tail(&cp
->link2_ccbq
, &np
->dummy_ccbq
);
4796 if (cp
->tag
!= NO_TAG
)
4799 --lp
->started_no_tag
;
4807 * Allocate a CCB from memory and initialize its fixed part.
4809 static struct sym_ccb
*sym_alloc_ccb(struct sym_hcb
*np
)
4811 struct sym_ccb
*cp
= NULL
;
4815 * Prevent from allocating more CCBs than we can
4816 * queue to the controller.
4818 if (np
->actccbs
>= SYM_CONF_MAX_START
)
4822 * Allocate memory for this CCB.
4824 cp
= sym_calloc_dma(sizeof(struct sym_ccb
), "CCB");
4834 * Compute the bus address of this ccb.
4836 cp
->ccb_ba
= vtobus(cp
);
4839 * Insert this ccb into the hashed list.
4841 hcode
= CCB_HASH_CODE(cp
->ccb_ba
);
4842 cp
->link_ccbh
= np
->ccbh
[hcode
];
4843 np
->ccbh
[hcode
] = cp
;
4846 * Initialyze the start and restart actions.
4848 cp
->phys
.head
.go
.start
= cpu_to_scr(SCRIPTA_BA(np
, idle
));
4849 cp
->phys
.head
.go
.restart
= cpu_to_scr(SCRIPTB_BA(np
, bad_i_t_l
));
4852 * Initilialyze some other fields.
4854 cp
->phys
.smsg_ext
.addr
= cpu_to_scr(HCB_BA(np
, msgin
[2]));
4857 * Chain into free ccb queue.
4859 sym_insque_head(&cp
->link_ccbq
, &np
->free_ccbq
);
4862 * Chain into optionnal lists.
4864 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4865 sym_insque_head(&cp
->link2_ccbq
, &np
->dummy_ccbq
);
4870 sym_mfree_dma(cp
, sizeof(*cp
), "CCB");
4875 * Look up a CCB from a DSA value.
4877 static struct sym_ccb
*sym_ccb_from_dsa(struct sym_hcb
*np
, u32 dsa
)
4882 hcode
= CCB_HASH_CODE(dsa
);
4883 cp
= np
->ccbh
[hcode
];
4885 if (cp
->ccb_ba
== dsa
)
4894 * Target control block initialisation.
4895 * Nothing important to do at the moment.
4897 static void sym_init_tcb (struct sym_hcb
*np
, u_char tn
)
4902 * Lun control block allocation and initialization.
4904 struct sym_lcb
*sym_alloc_lcb (struct sym_hcb
*np
, u_char tn
, u_char ln
)
4906 struct sym_tcb
*tp
= &np
->target
[tn
];
4907 struct sym_lcb
*lp
= NULL
;
4910 * Initialize the target control block if not yet.
4912 sym_init_tcb (np
, tn
);
4915 * Allocate the LCB bus address array.
4916 * Compute the bus address of this table.
4918 if (ln
&& !tp
->luntbl
) {
4921 tp
->luntbl
= sym_calloc_dma(256, "LUNTBL");
4924 for (i
= 0 ; i
< 64 ; i
++)
4925 tp
->luntbl
[i
] = cpu_to_scr(vtobus(&np
->badlun_sa
));
4926 tp
->head
.luntbl_sa
= cpu_to_scr(vtobus(tp
->luntbl
));
4930 * Allocate the table of pointers for LUN(s) > 0, if needed.
4932 if (ln
&& !tp
->lunmp
) {
4933 tp
->lunmp
= kcalloc(SYM_CONF_MAX_LUN
, sizeof(struct sym_lcb
*),
4941 * Make it available to the chip.
4943 lp
= sym_calloc_dma(sizeof(struct sym_lcb
), "LCB");
4948 tp
->luntbl
[ln
] = cpu_to_scr(vtobus(lp
));
4952 tp
->head
.lun0_sa
= cpu_to_scr(vtobus(lp
));
4957 * Let the itl task point to error handling.
4959 lp
->head
.itl_task_sa
= cpu_to_scr(np
->bad_itl_ba
);
4962 * Set the reselect pattern to our default. :)
4964 lp
->head
.resel_sa
= cpu_to_scr(SCRIPTB_BA(np
, resel_bad_lun
));
4967 * Set user capabilities.
4969 lp
->user_flags
= tp
->usrflags
& (SYM_DISC_ENABLED
| SYM_TAGS_ENABLED
);
4971 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
4973 * Initialize device queueing.
4975 sym_que_init(&lp
->waiting_ccbq
);
4976 sym_que_init(&lp
->started_ccbq
);
4977 lp
->started_max
= SYM_CONF_MAX_TASK
;
4978 lp
->started_limit
= SYM_CONF_MAX_TASK
;
4986 * Allocate LCB resources for tagged command queuing.
4988 static void sym_alloc_lcb_tags (struct sym_hcb
*np
, u_char tn
, u_char ln
)
4990 struct sym_tcb
*tp
= &np
->target
[tn
];
4991 struct sym_lcb
*lp
= sym_lp(tp
, ln
);
4995 * Allocate the task table and and the tag allocation
4996 * circular buffer. We want both or none.
4998 lp
->itlq_tbl
= sym_calloc_dma(SYM_CONF_MAX_TASK
*4, "ITLQ_TBL");
5001 lp
->cb_tags
= kcalloc(SYM_CONF_MAX_TASK
, 1, GFP_ATOMIC
);
5003 sym_mfree_dma(lp
->itlq_tbl
, SYM_CONF_MAX_TASK
*4, "ITLQ_TBL");
5004 lp
->itlq_tbl
= NULL
;
5009 * Initialize the task table with invalid entries.
5011 for (i
= 0 ; i
< SYM_CONF_MAX_TASK
; i
++)
5012 lp
->itlq_tbl
[i
] = cpu_to_scr(np
->notask_ba
);
5015 * Fill up the tag buffer with tag numbers.
5017 for (i
= 0 ; i
< SYM_CONF_MAX_TASK
; i
++)
5021 * Make the task table available to SCRIPTS,
5022 * And accept tagged commands now.
5024 lp
->head
.itlq_tbl_sa
= cpu_to_scr(vtobus(lp
->itlq_tbl
));
5032 * Lun control block deallocation. Returns the number of valid remaing LCBs
5035 int sym_free_lcb(struct sym_hcb
*np
, u_char tn
, u_char ln
)
5037 struct sym_tcb
*tp
= &np
->target
[tn
];
5038 struct sym_lcb
*lp
= sym_lp(tp
, ln
);
5045 sym_mfree_dma(tp
->luntbl
, 256, "LUNTBL");
5048 tp
->head
.luntbl_sa
= cpu_to_scr(vtobus(np
->badluntbl
));
5050 tp
->luntbl
[ln
] = cpu_to_scr(vtobus(&np
->badlun_sa
));
5051 tp
->lunmp
[ln
] = NULL
;
5055 tp
->head
.lun0_sa
= cpu_to_scr(vtobus(&np
->badlun_sa
));
5059 sym_mfree_dma(lp
->itlq_tbl
, SYM_CONF_MAX_TASK
*4, "ITLQ_TBL");
5063 sym_mfree_dma(lp
, sizeof(*lp
), "LCB");
5069 * Queue a SCSI IO to the controller.
5071 int sym_queue_scsiio(struct sym_hcb
*np
, struct scsi_cmnd
*cmd
, struct sym_ccb
*cp
)
5073 struct scsi_device
*sdev
= cmd
->device
;
5081 * Keep track of the IO in our CCB.
5086 * Retrieve the target descriptor.
5088 tp
= &np
->target
[cp
->target
];
5091 * Retrieve the lun descriptor.
5093 lp
= sym_lp(tp
, sdev
->lun
);
5095 can_disconnect
= (cp
->tag
!= NO_TAG
) ||
5096 (lp
&& (lp
->curr_flags
& SYM_DISC_ENABLED
));
5098 msgptr
= cp
->scsi_smsg
;
5100 msgptr
[msglen
++] = IDENTIFY(can_disconnect
, sdev
->lun
);
5103 * Build the tag message if present.
5105 if (cp
->tag
!= NO_TAG
) {
5106 u_char order
= cp
->order
;
5114 order
= M_SIMPLE_TAG
;
5116 #ifdef SYM_OPT_LIMIT_COMMAND_REORDERING
5118 * Avoid too much reordering of SCSI commands.
5119 * The algorithm tries to prevent completion of any
5120 * tagged command from being delayed against more
5121 * than 3 times the max number of queued commands.
5123 if (lp
&& lp
->tags_since
> 3*SYM_CONF_MAX_TAG
) {
5124 lp
->tags_si
= !(lp
->tags_si
);
5125 if (lp
->tags_sum
[lp
->tags_si
]) {
5126 order
= M_ORDERED_TAG
;
5127 if ((DEBUG_FLAGS
& DEBUG_TAGS
)||sym_verbose
>1) {
5129 "ordered tag forced.\n");
5135 msgptr
[msglen
++] = order
;
5138 * For less than 128 tags, actual tags are numbered
5139 * 1,3,5,..2*MAXTAGS+1,since we may have to deal
5140 * with devices that have problems with #TAG 0 or too
5141 * great #TAG numbers. For more tags (up to 256),
5142 * we use directly our tag number.
5144 #if SYM_CONF_MAX_TASK > (512/4)
5145 msgptr
[msglen
++] = cp
->tag
;
5147 msgptr
[msglen
++] = (cp
->tag
<< 1) + 1;
5152 * Build a negotiation message if needed.
5153 * (nego_status is filled by sym_prepare_nego())
5155 * Always negotiate on INQUIRY and REQUEST SENSE.
5158 cp
->nego_status
= 0;
5159 if ((tp
->tgoal
.check_nego
||
5160 cmd
->cmnd
[0] == INQUIRY
|| cmd
->cmnd
[0] == REQUEST_SENSE
) &&
5161 !tp
->nego_cp
&& lp
) {
5162 msglen
+= sym_prepare_nego(np
, cp
, msgptr
+ msglen
);
5168 cp
->phys
.head
.go
.start
= cpu_to_scr(SCRIPTA_BA(np
, select
));
5169 cp
->phys
.head
.go
.restart
= cpu_to_scr(SCRIPTA_BA(np
, resel_dsa
));
5174 cp
->phys
.select
.sel_id
= cp
->target
;
5175 cp
->phys
.select
.sel_scntl3
= tp
->head
.wval
;
5176 cp
->phys
.select
.sel_sxfer
= tp
->head
.sval
;
5177 cp
->phys
.select
.sel_scntl4
= tp
->head
.uval
;
5182 cp
->phys
.smsg
.addr
= CCB_BA(cp
, scsi_smsg
);
5183 cp
->phys
.smsg
.size
= cpu_to_scr(msglen
);
5188 cp
->host_xflags
= 0;
5189 cp
->host_status
= cp
->nego_status
? HS_NEGOTIATE
: HS_BUSY
;
5190 cp
->ssss_status
= S_ILLEGAL
;
5191 cp
->xerr_status
= 0;
5193 cp
->extra_bytes
= 0;
5196 * extreme data pointer.
5197 * shall be positive, so -1 is lower than lowest.:)
5203 * Build the CDB and DATA descriptor block
5206 return sym_setup_data_and_start(np
, cmd
, cp
);
5210 * Reset a SCSI target (all LUNs of this target).
5212 int sym_reset_scsi_target(struct sym_hcb
*np
, int target
)
5216 if (target
== np
->myaddr
|| (u_int
)target
>= SYM_CONF_MAX_TARGET
)
5219 tp
= &np
->target
[target
];
5222 np
->istat_sem
= SEM
;
5223 OUTB(np
, nc_istat
, SIGP
|SEM
);
5231 static int sym_abort_ccb(struct sym_hcb
*np
, struct sym_ccb
*cp
, int timed_out
)
5234 * Check that the IO is active.
5236 if (!cp
|| !cp
->host_status
|| cp
->host_status
== HS_WAIT
)
5240 * If a previous abort didn't succeed in time,
5241 * perform a BUS reset.
5244 sym_reset_scsi_bus(np
, 1);
5249 * Mark the CCB for abort and allow time for.
5251 cp
->to_abort
= timed_out
? 2 : 1;
5254 * Tell the SCRIPTS processor to stop and synchronize with us.
5256 np
->istat_sem
= SEM
;
5257 OUTB(np
, nc_istat
, SIGP
|SEM
);
5261 int sym_abort_scsiio(struct sym_hcb
*np
, struct scsi_cmnd
*cmd
, int timed_out
)
5267 * Look up our CCB control block.
5270 FOR_EACH_QUEUED_ELEMENT(&np
->busy_ccbq
, qp
) {
5271 struct sym_ccb
*cp2
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
5272 if (cp2
->cmd
== cmd
) {
5278 return sym_abort_ccb(np
, cp
, timed_out
);
5282 * Complete execution of a SCSI command with extended
5283 * error, SCSI status error, or having been auto-sensed.
5285 * The SCRIPTS processor is not running there, so we
5286 * can safely access IO registers and remove JOBs from
5288 * SCRATCHA is assumed to have been loaded with STARTPOS
5289 * before the SCRIPTS called the C code.
5291 void sym_complete_error(struct sym_hcb
*np
, struct sym_ccb
*cp
)
5293 struct scsi_device
*sdev
;
5294 struct scsi_cmnd
*cmd
;
5301 * Paranoid check. :)
5303 if (!cp
|| !cp
->cmd
)
5308 if (DEBUG_FLAGS
& (DEBUG_TINY
|DEBUG_RESULT
)) {
5309 dev_info(&sdev
->sdev_gendev
, "CCB=%p STAT=%x/%x/%x\n", cp
,
5310 cp
->host_status
, cp
->ssss_status
, cp
->host_flags
);
5314 * Get target and lun pointers.
5316 tp
= &np
->target
[cp
->target
];
5317 lp
= sym_lp(tp
, sdev
->lun
);
5320 * Check for extended errors.
5322 if (cp
->xerr_status
) {
5324 sym_print_xerr(cmd
, cp
->xerr_status
);
5325 if (cp
->host_status
== HS_COMPLETE
)
5326 cp
->host_status
= HS_COMP_ERR
;
5330 * Calculate the residual.
5332 resid
= sym_compute_residual(np
, cp
);
5334 if (!SYM_SETUP_RESIDUAL_SUPPORT
) {/* If user does not want residuals */
5335 resid
= 0; /* throw them away. :) */
5340 printf("XXXX RESID= %d - 0x%x\n", resid
, resid
);
5344 * Dequeue all queued CCBs for that device
5345 * not yet started by SCRIPTS.
5347 i
= (INL(np
, nc_scratcha
) - np
->squeue_ba
) / 4;
5348 i
= sym_dequeue_from_squeue(np
, i
, cp
->target
, sdev
->lun
, -1);
5351 * Restart the SCRIPTS processor.
5353 OUTL_DSP(np
, SCRIPTA_BA(np
, start
));
5355 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5356 if (cp
->host_status
== HS_COMPLETE
&&
5357 cp
->ssss_status
== S_QUEUE_FULL
) {
5358 if (!lp
|| lp
->started_tags
- i
< 2)
5361 * Decrease queue depth as needed.
5363 lp
->started_max
= lp
->started_tags
- i
- 1;
5366 if (sym_verbose
>= 2) {
5367 sym_print_addr(cmd
, " queue depth is now %d\n",
5374 cp
->host_status
= HS_BUSY
;
5375 cp
->ssss_status
= S_ILLEGAL
;
5378 * Let's requeue it to device.
5380 sym_set_cam_status(cmd
, DID_SOFT_ERROR
);
5386 * Build result in CAM ccb.
5388 sym_set_cam_result_error(np
, cp
, resid
);
5390 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5394 * Add this one to the COMP queue.
5396 sym_remque(&cp
->link_ccbq
);
5397 sym_insque_head(&cp
->link_ccbq
, &np
->comp_ccbq
);
5400 * Complete all those commands with either error
5401 * or requeue condition.
5403 sym_flush_comp_queue(np
, 0);
5405 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5407 * Donnot start more than 1 command after an error.
5409 sym_start_next_ccbs(np
, lp
, 1);
5414 * Complete execution of a successful SCSI command.
5416 * Only successful commands go to the DONE queue,
5417 * since we need to have the SCRIPTS processor
5418 * stopped on any error condition.
5419 * The SCRIPTS processor is running while we are
5420 * completing successful commands.
5422 void sym_complete_ok (struct sym_hcb
*np
, struct sym_ccb
*cp
)
5426 struct scsi_cmnd
*cmd
;
5430 * Paranoid check. :)
5432 if (!cp
|| !cp
->cmd
)
5434 assert (cp
->host_status
== HS_COMPLETE
);
5442 * Get target and lun pointers.
5444 tp
= &np
->target
[cp
->target
];
5445 lp
= sym_lp(tp
, cp
->lun
);
5448 * If all data have been transferred, given than no
5449 * extended error did occur, there is no residual.
5452 if (cp
->phys
.head
.lastp
!= cp
->goalp
)
5453 resid
= sym_compute_residual(np
, cp
);
5456 * Wrong transfer residuals may be worse than just always
5457 * returning zero. User can disable this feature in
5458 * sym53c8xx.h. Residual support is enabled by default.
5460 if (!SYM_SETUP_RESIDUAL_SUPPORT
)
5464 printf("XXXX RESID= %d - 0x%x\n", resid
, resid
);
5468 * Build result in CAM ccb.
5470 sym_set_cam_result_ok(cp
, cmd
, resid
);
5472 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5474 * If max number of started ccbs had been reduced,
5475 * increase it if 200 good status received.
5477 if (lp
&& lp
->started_max
< lp
->started_limit
) {
5479 if (lp
->num_sgood
>= 200) {
5482 if (sym_verbose
>= 2) {
5483 sym_print_addr(cmd
, " queue depth is now %d\n",
5493 sym_free_ccb (np
, cp
);
5495 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5497 * Requeue a couple of awaiting scsi commands.
5499 if (!sym_que_empty(&lp
->waiting_ccbq
))
5500 sym_start_next_ccbs(np
, lp
, 2);
5503 * Complete the command.
5505 sym_xpt_done(np
, cmd
);
5509 * Soft-attach the controller.
5511 int sym_hcb_attach(struct Scsi_Host
*shost
, struct sym_fw
*fw
, struct sym_nvram
*nvram
)
5513 struct sym_hcb
*np
= sym_get_hcb(shost
);
5517 * Get some info about the firmware.
5519 np
->scripta_sz
= fw
->a_size
;
5520 np
->scriptb_sz
= fw
->b_size
;
5521 np
->scriptz_sz
= fw
->z_size
;
5522 np
->fw_setup
= fw
->setup
;
5523 np
->fw_patch
= fw
->patch
;
5524 np
->fw_name
= fw
->name
;
5527 * Save setting of some IO registers, so we will
5528 * be able to probe specific implementations.
5530 sym_save_initial_setting (np
);
5533 * Reset the chip now, since it has been reported
5534 * that SCSI clock calibration may not work properly
5535 * if the chip is currently active.
5540 * Prepare controller and devices settings, according
5541 * to chip features, user set-up and driver set-up.
5543 sym_prepare_setting(shost
, np
, nvram
);
5546 * Check the PCI clock frequency.
5547 * Must be performed after prepare_setting since it destroys
5548 * STEST1 that is used to probe for the clock doubler.
5550 i
= sym_getpciclock(np
);
5551 if (i
> 37000 && !(np
->features
& FE_66MHZ
))
5552 printf("%s: PCI BUS clock seems too high: %u KHz.\n",
5556 * Allocate the start queue.
5558 np
->squeue
= sym_calloc_dma(sizeof(u32
)*(MAX_QUEUE
*2),"SQUEUE");
5561 np
->squeue_ba
= vtobus(np
->squeue
);
5564 * Allocate the done queue.
5566 np
->dqueue
= sym_calloc_dma(sizeof(u32
)*(MAX_QUEUE
*2),"DQUEUE");
5569 np
->dqueue_ba
= vtobus(np
->dqueue
);
5572 * Allocate the target bus address array.
5574 np
->targtbl
= sym_calloc_dma(256, "TARGTBL");
5577 np
->targtbl_ba
= vtobus(np
->targtbl
);
5580 * Allocate SCRIPTS areas.
5582 np
->scripta0
= sym_calloc_dma(np
->scripta_sz
, "SCRIPTA0");
5583 np
->scriptb0
= sym_calloc_dma(np
->scriptb_sz
, "SCRIPTB0");
5584 np
->scriptz0
= sym_calloc_dma(np
->scriptz_sz
, "SCRIPTZ0");
5585 if (!np
->scripta0
|| !np
->scriptb0
|| !np
->scriptz0
)
5589 * Allocate the array of lists of CCBs hashed by DSA.
5591 np
->ccbh
= kcalloc(CCB_HASH_SIZE
, sizeof(struct sym_ccb
**), GFP_KERNEL
);
5596 * Initialyze the CCB free and busy queues.
5598 sym_que_init(&np
->free_ccbq
);
5599 sym_que_init(&np
->busy_ccbq
);
5600 sym_que_init(&np
->comp_ccbq
);
5603 * Initialization for optional handling
5604 * of device queueing.
5606 #ifdef SYM_OPT_HANDLE_DEVICE_QUEUEING
5607 sym_que_init(&np
->dummy_ccbq
);
5610 * Allocate some CCB. We need at least ONE.
5612 if (!sym_alloc_ccb(np
))
5616 * Calculate BUS addresses where we are going
5617 * to load the SCRIPTS.
5619 np
->scripta_ba
= vtobus(np
->scripta0
);
5620 np
->scriptb_ba
= vtobus(np
->scriptb0
);
5621 np
->scriptz_ba
= vtobus(np
->scriptz0
);
5624 np
->scripta_ba
= np
->ram_ba
;
5625 if (np
->features
& FE_RAM8K
) {
5626 np
->scriptb_ba
= np
->scripta_ba
+ 4096;
5631 * Copy scripts to controller instance.
5633 memcpy(np
->scripta0
, fw
->a_base
, np
->scripta_sz
);
5634 memcpy(np
->scriptb0
, fw
->b_base
, np
->scriptb_sz
);
5635 memcpy(np
->scriptz0
, fw
->z_base
, np
->scriptz_sz
);
5638 * Setup variable parts in scripts and compute
5639 * scripts bus addresses used from the C code.
5641 np
->fw_setup(np
, fw
);
5644 * Bind SCRIPTS with physical addresses usable by the
5645 * SCRIPTS processor (as seen from the BUS = BUS addresses).
5647 sym_fw_bind_script(np
, (u32
*) np
->scripta0
, np
->scripta_sz
);
5648 sym_fw_bind_script(np
, (u32
*) np
->scriptb0
, np
->scriptb_sz
);
5649 sym_fw_bind_script(np
, (u32
*) np
->scriptz0
, np
->scriptz_sz
);
5651 #ifdef SYM_CONF_IARB_SUPPORT
5653 * If user wants IARB to be set when we win arbitration
5654 * and have other jobs, compute the max number of consecutive
5655 * settings of IARB hints before we leave devices a chance to
5656 * arbitrate for reselection.
5658 #ifdef SYM_SETUP_IARB_MAX
5659 np
->iarb_max
= SYM_SETUP_IARB_MAX
;
5666 * Prepare the idle and invalid task actions.
5668 np
->idletask
.start
= cpu_to_scr(SCRIPTA_BA(np
, idle
));
5669 np
->idletask
.restart
= cpu_to_scr(SCRIPTB_BA(np
, bad_i_t_l
));
5670 np
->idletask_ba
= vtobus(&np
->idletask
);
5672 np
->notask
.start
= cpu_to_scr(SCRIPTA_BA(np
, idle
));
5673 np
->notask
.restart
= cpu_to_scr(SCRIPTB_BA(np
, bad_i_t_l
));
5674 np
->notask_ba
= vtobus(&np
->notask
);
5676 np
->bad_itl
.start
= cpu_to_scr(SCRIPTA_BA(np
, idle
));
5677 np
->bad_itl
.restart
= cpu_to_scr(SCRIPTB_BA(np
, bad_i_t_l
));
5678 np
->bad_itl_ba
= vtobus(&np
->bad_itl
);
5680 np
->bad_itlq
.start
= cpu_to_scr(SCRIPTA_BA(np
, idle
));
5681 np
->bad_itlq
.restart
= cpu_to_scr(SCRIPTB_BA(np
,bad_i_t_l_q
));
5682 np
->bad_itlq_ba
= vtobus(&np
->bad_itlq
);
5685 * Allocate and prepare the lun JUMP table that is used
5686 * for a target prior the probing of devices (bad lun table).
5687 * A private table will be allocated for the target on the
5688 * first INQUIRY response received.
5690 np
->badluntbl
= sym_calloc_dma(256, "BADLUNTBL");
5694 np
->badlun_sa
= cpu_to_scr(SCRIPTB_BA(np
, resel_bad_lun
));
5695 for (i
= 0 ; i
< 64 ; i
++) /* 64 luns/target, no less */
5696 np
->badluntbl
[i
] = cpu_to_scr(vtobus(&np
->badlun_sa
));
5699 * Prepare the bus address array that contains the bus
5700 * address of each target control block.
5701 * For now, assume all logical units are wrong. :)
5703 for (i
= 0 ; i
< SYM_CONF_MAX_TARGET
; i
++) {
5704 np
->targtbl
[i
] = cpu_to_scr(vtobus(&np
->target
[i
]));
5705 np
->target
[i
].head
.luntbl_sa
=
5706 cpu_to_scr(vtobus(np
->badluntbl
));
5707 np
->target
[i
].head
.lun0_sa
=
5708 cpu_to_scr(vtobus(&np
->badlun_sa
));
5712 * Now check the cache handling of the pci chipset.
5714 if (sym_snooptest (np
)) {
5715 printf("%s: CACHE INCORRECTLY CONFIGURED.\n", sym_name(np
));
5720 * Sigh! we are done.
5729 * Free everything that has been allocated for this device.
5731 void sym_hcb_free(struct sym_hcb
*np
)
5739 sym_mfree_dma(np
->scriptz0
, np
->scriptz_sz
, "SCRIPTZ0");
5741 sym_mfree_dma(np
->scriptb0
, np
->scriptb_sz
, "SCRIPTB0");
5743 sym_mfree_dma(np
->scripta0
, np
->scripta_sz
, "SCRIPTA0");
5745 sym_mfree_dma(np
->squeue
, sizeof(u32
)*(MAX_QUEUE
*2), "SQUEUE");
5747 sym_mfree_dma(np
->dqueue
, sizeof(u32
)*(MAX_QUEUE
*2), "DQUEUE");
5750 while ((qp
= sym_remque_head(&np
->free_ccbq
)) != NULL
) {
5751 cp
= sym_que_entry(qp
, struct sym_ccb
, link_ccbq
);
5752 sym_mfree_dma(cp
, sizeof(*cp
), "CCB");
5758 sym_mfree_dma(np
->badluntbl
, 256,"BADLUNTBL");
5760 for (target
= 0; target
< SYM_CONF_MAX_TARGET
; target
++) {
5761 tp
= &np
->target
[target
];
5763 sym_mfree_dma(tp
->luntbl
, 256, "LUNTBL");
5764 #if SYM_CONF_MAX_LUN > 1
5769 sym_mfree_dma(np
->targtbl
, 256, "TARGTBL");